Clean up of --help output

For consistency and readability

youtube_dl/options.py

@@ -120,19 +120,19 @@ def parseOpts(overrideArguments=None):
     general.add_option(
         '-h', '--help',
         action='help',
-        help='print this help text and exit')
+        help='Print this help text and exit')
     general.add_option(
         '-v', '--version',
         action='version',
-        help='print program version and exit')
+        help='Print program version and exit')
     general.add_option(
         '-U', '--update',
         action='store_true', dest='update_self',
-        help='update this program to latest version. Make sure that you have sufficient permissions (run with sudo if needed)')
+        help='Update this program to latest version. Make sure that you have sufficient permissions (run with sudo if needed)')
     general.add_option(
         '-i', '--ignore-errors',
         action='store_true', dest='ignoreerrors', default=False,
-        help='continue on download errors, for example to skip unavailable videos in a playlist')
+        help='Continue on download errors, for example to skip unavailable videos in a playlist')
     general.add_option(
         '--abort-on-error',
         action='store_false', dest='ignoreerrors',
@@ -140,7 +140,7 @@ def parseOpts(overrideArguments=None):
     general.add_option(
         '--dump-user-agent',
         action='store_true', dest='dump_user_agent', default=False,
-        help='display the current browser identification')
+        help='Display the current browser identification')
     general.add_option(
         '--list-extractors',
         action='store_true', dest='list_extractors', default=False,
@@ -152,7 +152,7 @@ def parseOpts(overrideArguments=None):
     general.add_option(
         '--default-search',
         dest='default_search', metavar='PREFIX',
-        help='Use this prefix for unqualified URLs. For example "gvsearch2:" downloads two videos from google videos for  youtube-dl "large apple". Use the value "auto" to let youtube-dl guess ("auto_warning" to emit a warning when guessing). "error" just throws an error. The default value "fixup_error" repairs broken URLs, but emits an error if this is not possible instead of searching.')
+        help='Use this prefix for unqualified URLs. For example "gvsearch2:" downloads two videos from google videos for youtube-dl "large apple". Use the value "auto" to let youtube-dl guess ("auto_warning" to emit a warning when guessing). "error" just throws an error. The default value "fixup_error" repairs broken URLs, but emits an error if this is not possible instead of searching.')
     general.add_option(
         '--ignore-config',
         action='store_true',
@@ -169,7 +169,7 @@ def parseOpts(overrideArguments=None):
         '--no-color', '--no-colors',
         action='store_true', dest='no_color',
         default=False,
-        help='Do not emit color codes in output.')
+        help='Do not emit color codes in output')
 
     network = optparse.OptionGroup(parser, 'Network Options')
     network.add_option(
@@ -206,23 +206,23 @@ def parseOpts(overrideArguments=None):
     selection.add_option(
         '--playlist-start',
         dest='playliststart', metavar='NUMBER', default=1, type=int,
-        help='playlist video to start at (default is %default)')
+        help='Playlist video to start at (default is %default)')
     selection.add_option(
         '--playlist-end',
         dest='playlistend', metavar='NUMBER', default=None, type=int,
-        help='playlist video to end at (default is last)')
+        help='Playlist video to end at (default is last)')
     selection.add_option(
         '--playlist-items',
         dest='playlist_items', metavar='ITEM_SPEC', default=None,
-        help='playlist video items to download. Specify indices of the videos in the playlist seperated by commas like: "--playlist-items 1,2,5,8" if you want to download videos indexed 1, 2, 5, 8 in the playlist. You can specify range: "--playlist-items 1-3,7,10-13", it will download the videos at index 1, 2, 3, 7, 10, 11, 12 and 13.')
+        help='Playlist video items to download. Specify indices of the videos in the playlist seperated by commas like: "--playlist-items 1,2,5,8" if you want to download videos indexed 1, 2, 5, 8 in the playlist. You can specify range: "--playlist-items 1-3,7,10-13", it will download the videos at index 1, 2, 3, 7, 10, 11, 12 and 13.')
     selection.add_option(
         '--match-title',
         dest='matchtitle', metavar='REGEX',
-        help='download only matching titles (regex or caseless sub-string)')
+        help='Download only matching titles (regex or caseless sub-string)')
     selection.add_option(
         '--reject-title',
         dest='rejecttitle', metavar='REGEX',
-        help='skip download for matching titles (regex or caseless sub-string)')
+        help='Skip download for matching titles (regex or caseless sub-string)')
     selection.add_option(
         '--max-downloads',
         dest='max_downloads', metavar='NUMBER', type=int, default=None,
@@ -238,19 +238,19 @@ def parseOpts(overrideArguments=None):
     selection.add_option(
         '--date',
         metavar='DATE', dest='date', default=None,
-        help='download only videos uploaded in this date')
+        help='Download only videos uploaded in this date')
     selection.add_option(
         '--datebefore',
         metavar='DATE', dest='datebefore', default=None,
-        help='download only videos uploaded on or before this date (i.e. inclusive)')
+        help='Download only videos uploaded on or before this date (i.e. inclusive)')
     selection.add_option(
         '--dateafter',
         metavar='DATE', dest='dateafter', default=None,
-        help='download only videos uploaded on or after this date (i.e. inclusive)')
+        help='Download only videos uploaded on or after this date (i.e. inclusive)')
     selection.add_option(
         '--min-views',
         metavar='COUNT', dest='min_views', default=None, type=int,
-        help='Do not download any videos with less than COUNT views',)
+        help='Do not download any videos with less than COUNT views')
     selection.add_option(
         '--max-views',
         metavar='COUNT', dest='max_views', default=None, type=int,
@@ -259,7 +259,7 @@ def parseOpts(overrideArguments=None):
         '--match-filter',
         metavar='FILTER', dest='match_filter', default=None,
         help=(
-            '(Experimental) Generic video filter. '
+            'Generic video filter (experimental). '
             'Specify any key (see help for -o for a list of available keys) to'
             ' match if the key is present, '
             '!key to check if the key is not present,'
@@ -277,15 +277,15 @@ def parseOpts(overrideArguments=None):
     selection.add_option(
         '--no-playlist',
         action='store_true', dest='noplaylist', default=False,
-        help='If the URL refers to a video and a playlist, download only the video.')
+        help='Download only the video, if the URL refers to a video and a playlist.')
     selection.add_option(
         '--yes-playlist',
         action='store_false', dest='noplaylist', default=False,
-        help='If the URL refers to a video and a playlist, download the playlist.')
+        help='Download the playlist, if the URL refers to a video and a playlist.')
     selection.add_option(
         '--age-limit',
         metavar='YEARS', dest='age_limit', default=None, type=int,
-        help='download only videos suitable for the given age')
+        help='Download only videos suitable for the given age')
     selection.add_option(
         '--download-archive', metavar='FILE',
         dest='download_archive',
@@ -299,30 +299,30 @@ def parseOpts(overrideArguments=None):
     authentication.add_option(
         '-u', '--username',
         dest='username', metavar='USERNAME',
-        help='login with this account ID')
+        help='Login with this account ID')
     authentication.add_option(
         '-p', '--password',
         dest='password', metavar='PASSWORD',
-        help='account password. If this option is left out, youtube-dl will ask interactively.')
+        help='Account password. If this option is left out, youtube-dl will ask interactively.')
     authentication.add_option(
         '-2', '--twofactor',
         dest='twofactor', metavar='TWOFACTOR',
-        help='two-factor auth code')
+        help='Two-factor auth code')
     authentication.add_option(
         '-n', '--netrc',
         action='store_true', dest='usenetrc', default=False,
-        help='use .netrc authentication data')
+        help='Use .netrc authentication data')
     authentication.add_option(
         '--video-password',
         dest='videopassword', metavar='PASSWORD',
-        help='video password (vimeo, smotri)')
+        help='Video password (vimeo, smotri)')
 
     video_format = optparse.OptionGroup(parser, 'Video Format Options')
     video_format.add_option(
         '-f', '--format',
         action='store', dest='format', metavar='FORMAT', default=None,
         help=(
-            'video format code, specify the order of preference using'
+            'Video format code, specify the order of preference using'
             ' slashes, as in -f 22/17/18 . '
             ' Instead of format codes, you can select by extension for the '
             'extensions aac, m4a, mp3, mp4, ogg, wav, webm. '
@@ -350,19 +350,19 @@ def parseOpts(overrideArguments=None):
     video_format.add_option(
         '--all-formats',
         action='store_const', dest='format', const='all',
-        help='download all available video formats')
+        help='Download all available video formats')
     video_format.add_option(
         '--prefer-free-formats',
         action='store_true', dest='prefer_free_formats', default=False,
-        help='prefer free video formats unless a specific one is requested')
+        help='Prefer free video formats unless a specific one is requested')
     video_format.add_option(
         '--max-quality',
         action='store', dest='format_limit', metavar='FORMAT',
-        help='highest quality format to download')
+        help='Specify highest quality format to download')
     video_format.add_option(
         '-F', '--list-formats',
         action='store_true', dest='listformats',
-        help='list all available formats')
+        help='List all available formats')
     video_format.add_option(
         '--youtube-include-dash-manifest',
         action='store_true', dest='youtube_include_dash_manifest', default=True,
@@ -382,46 +382,46 @@ def parseOpts(overrideArguments=None):
     subtitles.add_option(
         '--write-sub', '--write-srt',
         action='store_true', dest='writesubtitles', default=False,
-        help='write subtitle file')
+        help='Write subtitle file')
     subtitles.add_option(
         '--write-auto-sub', '--write-automatic-sub',
         action='store_true', dest='writeautomaticsub', default=False,
-        help='write automatic subtitle file (youtube only)')
+        help='Write automatic subtitle file (YouTube only)')
     subtitles.add_option(
         '--all-subs',
         action='store_true', dest='allsubtitles', default=False,
-        help='downloads all the available subtitles of the video')
+        help='Download all the available subtitles of the video')
     subtitles.add_option(
         '--list-subs',
         action='store_true', dest='listsubtitles', default=False,
-        help='lists all available subtitles for the video')
+        help='List all available subtitles for the video')
     subtitles.add_option(
         '--sub-format',
         action='store', dest='subtitlesformat', metavar='FORMAT', default='best',
-        help='subtitle format, accepts formats preference, for example: "ass/srt/best"')
+        help='Specify subtitle format preference, for example: "srt" or "ass/srt/best"')
     subtitles.add_option(
         '--sub-lang', '--sub-langs', '--srt-lang',
         action='callback', dest='subtitleslangs', metavar='LANGS', type='str',
         default=[], callback=_comma_separated_values_options_callback,
-        help='languages of the subtitles to download (optional) separated by commas, use IETF language tags like \'en,pt\'')
+        help='Languages of the subtitles to download (optional) separated by commas, use IETF language tags like \'en,pt\'')
 
     downloader = optparse.OptionGroup(parser, 'Download Options')
     downloader.add_option(
         '-r', '--rate-limit',
         dest='ratelimit', metavar='LIMIT',
-        help='maximum download rate in bytes per second (e.g. 50K or 4.2M)')
+        help='Maximum download rate in bytes per second (e.g. 50K or 4.2M)')
     downloader.add_option(
         '-R', '--retries',
         dest='retries', metavar='RETRIES', default=10,
-        help='number of retries (default is %default), or "infinite".')
+        help='Number of retries (default is %default), or "infinite".')
     downloader.add_option(
         '--buffer-size',
         dest='buffersize', metavar='SIZE', default='1024',
-        help='size of download buffer (e.g. 1024 or 16K) (default is %default)')
+        help='Size of download buffer (e.g. 1024 or 16K) (default is %default)')
     downloader.add_option(
         '--no-resize-buffer',
         action='store_true', dest='noresizebuffer', default=False,
-        help='do not automatically adjust the buffer size. By default, the buffer size is automatically resized from an initial value of SIZE.')
+        help='Do not automatically adjust the buffer size. By default, the buffer size is automatically resized from an initial value of SIZE.')
     downloader.add_option(
         '--test',
         action='store_true', dest='test', default=False,
@@ -433,11 +433,11 @@ def parseOpts(overrideArguments=None):
     downloader.add_option(
         '--xattr-set-filesize',
         dest='xattr_set_filesize', action='store_true',
-        help='(experimental) set file xattribute ytdl.filesize with expected filesize')
+        help='Set file xattribute ytdl.filesize with expected filesize (experimental)')
     downloader.add_option(
         '--hls-prefer-native',
         dest='hls_prefer_native', action='store_true',
-        help='(experimental) Use the native HLS downloader instead of ffmpeg.')
+        help='Use the native HLS downloader instead of ffmpeg (experimental)')
     downloader.add_option(
         '--external-downloader',
         dest='external_downloader', metavar='COMMAND',
@@ -446,7 +446,7 @@ def parseOpts(overrideArguments=None):
     downloader.add_option(
         '--external-downloader-args',
         dest='external_downloader_args', metavar='ARGS',
-        help='Give these arguments to the external downloader.')
+        help='Give these arguments to the external downloader')
 
     workarounds = optparse.OptionGroup(parser, 'Workarounds')
     workarounds.add_option(
@@ -456,7 +456,7 @@ def parseOpts(overrideArguments=None):
     workarounds.add_option(
         '--no-check-certificate',
         action='store_true', dest='no_check_certificate', default=False,
-        help='Suppress HTTPS certificate validation.')
+        help='Suppress HTTPS certificate validation')
     workarounds.add_option(
         '--prefer-insecure',
         '--prefer-unsecure', action='store_true', dest='prefer_insecure',
@@ -464,16 +464,16 @@ def parseOpts(overrideArguments=None):
     workarounds.add_option(
         '--user-agent',
         metavar='UA', dest='user_agent',
-        help='specify a custom user agent')
+        help='Specify a custom user agent')
     workarounds.add_option(
         '--referer',
         metavar='URL', dest='referer', default=None,
-        help='specify a custom referer, use if the video access is restricted to one domain',
+        help='Specify a custom referer, use if the video access is restricted to one domain',
     )
     workarounds.add_option(
         '--add-header',
         metavar='FIELD:VALUE', dest='headers', action='append',
-        help='specify a custom HTTP header and its value, separated by a colon \':\'. You can use this option multiple times',
+        help='Specify a custom HTTP header and its value, separated by a colon \':\'. You can use this option multiple times',
     )
     workarounds.add_option(
         '--bidi-workaround',
@@ -488,7 +488,7 @@ def parseOpts(overrideArguments=None):
     verbosity.add_option(
         '-q', '--quiet',
         action='store_true', dest='quiet', default=False,
-        help='activates quiet mode')
+        help='Activate quiet mode')
     verbosity.add_option(
         '--no-warnings',
         dest='no_warnings', action='store_true', default=False,
@@ -496,51 +496,51 @@ def parseOpts(overrideArguments=None):
     verbosity.add_option(
         '-s', '--simulate',
         action='store_true', dest='simulate', default=False,
-        help='do not download the video and do not write anything to disk',)
+        help='Do not download the video and do not write anything to disk')
     verbosity.add_option(
         '--skip-download',
         action='store_true', dest='skip_download', default=False,
-        help='do not download the video',)
+        help='Do not download the video')
     verbosity.add_option(
         '-g', '--get-url',
         action='store_true', dest='geturl', default=False,
-        help='simulate, quiet but print URL')
+        help='Simulate, quiet but print URL')
     verbosity.add_option(
         '-e', '--get-title',
         action='store_true', dest='gettitle', default=False,
-        help='simulate, quiet but print title')
+        help='Simulate, quiet but print title')
     verbosity.add_option(
         '--get-id',
         action='store_true', dest='getid', default=False,
-        help='simulate, quiet but print id')
+        help='Simulate, quiet but print id')
     verbosity.add_option(
         '--get-thumbnail',
         action='store_true', dest='getthumbnail', default=False,
-        help='simulate, quiet but print thumbnail URL')
+        help='Simulate, quiet but print thumbnail URL')
     verbosity.add_option(
         '--get-description',
         action='store_true', dest='getdescription', default=False,
-        help='simulate, quiet but print video description')
+        help='Simulate, quiet but print video description')
     verbosity.add_option(
         '--get-duration',
         action='store_true', dest='getduration', default=False,
-        help='simulate, quiet but print video length')
+        help='Simulate, quiet but print video length')
     verbosity.add_option(
         '--get-filename',
         action='store_true', dest='getfilename', default=False,
-        help='simulate, quiet but print output filename')
+        help='Simulate, quiet but print output filename')
     verbosity.add_option(
         '--get-format',
         action='store_true', dest='getformat', default=False,
-        help='simulate, quiet but print output format')
+        help='Simulate, quiet but print output format')
     verbosity.add_option(
         '-j', '--dump-json',
         action='store_true', dest='dumpjson', default=False,
-        help='simulate, quiet but print JSON information. See --output for a description of available keys.')
+        help='Simulate, quiet but print JSON information. See --output for a description of available keys.')
     verbosity.add_option(
         '-J', '--dump-single-json',
         action='store_true', dest='dump_single_json', default=False,
-        help='simulate, quiet but print JSON information for each command-line argument. If the URL refers to a playlist, dump the whole playlist information in a single line.')
+        help='Simulate, quiet but print JSON information for each command-line argument. If the URL refers to a playlist, dump the whole playlist information in a single line.')
     verbosity.add_option(
         '--print-json',
         action='store_true', dest='print_json', default=False,
@@ -549,23 +549,23 @@ def parseOpts(overrideArguments=None):
     verbosity.add_option(
         '--newline',
         action='store_true', dest='progress_with_newline', default=False,
-        help='output progress bar as new lines')
+        help='Output progress bar as new lines')
     verbosity.add_option(
         '--no-progress',
         action='store_true', dest='noprogress', default=False,
-        help='do not print progress bar')
+        help='Do not print progress bar')
     verbosity.add_option(
         '--console-title',
         action='store_true', dest='consoletitle', default=False,
-        help='display progress in console titlebar')
+        help='Display progress in console titlebar')
     verbosity.add_option(
         '-v', '--verbose',
         action='store_true', dest='verbose', default=False,
-        help='print various debugging information')
+        help='Print various debugging information')
     verbosity.add_option(
         '--dump-pages', '--dump-intermediate-pages',
         action='store_true', dest='dump_intermediate_pages', default=False,
-        help='print downloaded pages to debug problems (very verbose)')
+        help='Print downloaded pages to debug problems (very verbose)')
     verbosity.add_option(
         '--write-pages',
         action='store_true', dest='write_pages', default=False,
@@ -581,31 +581,31 @@ def parseOpts(overrideArguments=None):
     verbosity.add_option(
         '-C', '--call-home',
         dest='call_home', action='store_true', default=False,
-        help='Contact the youtube-dl server for debugging.')
+        help='Contact the youtube-dl server for debugging')
     verbosity.add_option(
         '--no-call-home',
         dest='call_home', action='store_false', default=False,
-        help='Do NOT contact the youtube-dl server for debugging.')
+        help='Do NOT contact the youtube-dl server for debugging')
 
     filesystem = optparse.OptionGroup(parser, 'Filesystem Options')
     filesystem.add_option(
         '-a', '--batch-file',
         dest='batchfile', metavar='FILE',
-        help='file containing URLs to download (\'-\' for stdin)')
+        help='File containing URLs to download (\'-\' for stdin)')
     filesystem.add_option(
         '--id', default=False,
-        action='store_true', dest='useid', help='use only video ID in file name')
+        action='store_true', dest='useid', help='Use only video ID in file name')
     filesystem.add_option(
         '-o', '--output',
         dest='outtmpl', metavar='TEMPLATE',
-        help=('output filename template. Use %(title)s to get the title, '
+        help=('Output filename template. Use %(title)s to get the title, '
               '%(uploader)s for the uploader name, %(uploader_id)s for the uploader nickname if different, '
               '%(autonumber)s to get an automatically incremented number, '
               '%(ext)s for the filename extension, '
               '%(format)s for the format description (like "22 - 1280x720" or "HD"), '
-              '%(format_id)s for the unique id of the format (like Youtube\'s itags: "137"), '
+              '%(format_id)s for the unique id of the format (like YouTube\'s itags: "137"), '
               '%(upload_date)s for the upload date (YYYYMMDD), '
-              '%(extractor)s for the provider (youtube, metacafe, etc), '
+              '%(extractor)s for the provider (YouTube, metacafe, etc), '
               '%(id)s for the video id, '
               '%(playlist_title)s, %(playlist_id)s, or %(playlist)s (=title if present, ID otherwise) for the playlist the video is in, '
               '%(playlist_index)s for the position in the playlist. '
@@ -617,7 +617,7 @@ def parseOpts(overrideArguments=None):
     filesystem.add_option(
         '--autonumber-size',
         dest='autonumber_size', metavar='NUMBER',
-        help='Specifies the number of digits in %(autonumber)s when it is present in output filename template or --auto-number option is given')
+        help='Specify the number of digits in %(autonumber)s when it is present in output filename template or --auto-number option is given')
     filesystem.add_option(
         '--restrict-filenames',
         action='store_true', dest='restrictfilenames', default=False,
@@ -625,55 +625,55 @@ def parseOpts(overrideArguments=None):
     filesystem.add_option(
         '-A', '--auto-number',
         action='store_true', dest='autonumber', default=False,
-        help='[deprecated; use  -o "%(autonumber)s-%(title)s.%(ext)s" ] number downloaded files starting from 00000')
+        help='[deprecated; use  -o "%(autonumber)s-%(title)s.%(ext)s" ] Number of downloaded files starting from 00000')
     filesystem.add_option(
         '-t', '--title',
         action='store_true', dest='usetitle', default=False,
-        help='[deprecated] use title in file name (default)')
+        help='[deprecated] Use title in file name (default)')
     filesystem.add_option(
         '-l', '--literal', default=False,
         action='store_true', dest='usetitle',
-        help='[deprecated] alias of --title')
+        help='[deprecated] Alias of --title')
     filesystem.add_option(
         '-w', '--no-overwrites',
         action='store_true', dest='nooverwrites', default=False,
-        help='do not overwrite files')
+        help='Do not overwrite files')
     filesystem.add_option(
         '-c', '--continue',
         action='store_true', dest='continue_dl', default=True,
-        help='force resume of partially downloaded files. By default, youtube-dl will resume downloads if possible.')
+        help='Force resume of partially downloaded files. By default, youtube-dl will resume downloads if possible.')
     filesystem.add_option(
         '--no-continue',
         action='store_false', dest='continue_dl',
-        help='do not resume partially downloaded files (restart from beginning)')
+        help='Do not resume partially downloaded files (restart from beginning)')
     filesystem.add_option(
         '--no-part',
         action='store_true', dest='nopart', default=False,
-        help='do not use .part files - write directly into output file')
+        help='Do not use .part files - write directly into output file')
     filesystem.add_option(
         '--no-mtime',
         action='store_false', dest='updatetime', default=True,
-        help='do not use the Last-modified header to set the file modification time')
+        help='Do not use the Last-modified header to set the file modification time')
     filesystem.add_option(
         '--write-description',
         action='store_true', dest='writedescription', default=False,
-        help='write video description to a .description file')
+        help='Write video description to a .description file')
     filesystem.add_option(
         '--write-info-json',
         action='store_true', dest='writeinfojson', default=False,
-        help='write video metadata to a .info.json file')
+        help='Write video metadata to a .info.json file')
     filesystem.add_option(
         '--write-annotations',
         action='store_true', dest='writeannotations', default=False,
-        help='write video annotations to a .annotation file')
+        help='Write video annotations to a .annotation file')
     filesystem.add_option(
         '--load-info',
         dest='load_info_filename', metavar='FILE',
-        help='json file containing the video information (created with the "--write-json" option)')
+        help='Specify JSON file containing the video information (created with the "--write-json" option)')
     filesystem.add_option(
         '--cookies',
         dest='cookiefile', metavar='FILE',
-        help='file to read cookies from and dump cookie jar in')
+        help='File to read cookies from and dump cookie jar in')
     filesystem.add_option(
         '--cache-dir', dest='cachedir', default=None, metavar='DIR',
         help='Location in the filesystem where youtube-dl can store some downloaded information permanently. By default $XDG_CACHE_HOME/youtube-dl or ~/.cache/youtube-dl . At the moment, only YouTube player files (for videos with obfuscated signatures) are cached, but that may change.')
@@ -689,11 +689,11 @@ def parseOpts(overrideArguments=None):
     thumbnail.add_option(
         '--write-thumbnail',
         action='store_true', dest='writethumbnail', default=False,
-        help='write thumbnail image to disk')
+        help='Write thumbnail image to disk')
     thumbnail.add_option(
         '--write-all-thumbnails',
         action='store_true', dest='write_all_thumbnails', default=False,
-        help='write all thumbnail image formats to disk')
+        help='Write all thumbnail image formats to disk')
     thumbnail.add_option(
         '--list-thumbnails',
         action='store_true', dest='list_thumbnails', default=False,
@@ -703,14 +703,14 @@ def parseOpts(overrideArguments=None):
     postproc.add_option(
         '-x', '--extract-audio',
         action='store_true', dest='extractaudio', default=False,
-        help='convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
+        help='Convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
     postproc.add_option(
         '--audio-format', metavar='FORMAT', dest='audioformat', default='best',
-        help='"best", "aac", "vorbis", "mp3", "m4a", "opus", or "wav"; "%default" by default')
+        help='Specify audio format: "best", "aac", "vorbis", "mp3", "m4a", "opus", or "wav"; "%default" by default')
     postproc.add_option(
         '--audio-quality', metavar='QUALITY',
         dest='audioquality', default='5',
-        help='ffmpeg/avconv audio quality specification, insert a value between 0 (better) and 9 (worse) for VBR or a specific bitrate like 128K (default %default)')
+        help='Specify ffmpeg/avconv audio quality, insert a value between 0 (better) and 9 (worse) for VBR or a specific bitrate like 128K (default %default)')
     postproc.add_option(
         '--recode-video',
         metavar='FORMAT', dest='recodevideo', default=None,
@@ -718,27 +718,27 @@ def parseOpts(overrideArguments=None):
     postproc.add_option(
         '-k', '--keep-video',
         action='store_true', dest='keepvideo', default=False,
-        help='keeps the video file on disk after the post-processing; the video is erased by default')
+        help='Keep the video file on disk after the post-processing; the video is erased by default')
     postproc.add_option(
         '--no-post-overwrites',
         action='store_true', dest='nopostoverwrites', default=False,
-        help='do not overwrite post-processed files; the post-processed files are overwritten by default')
+        help='Do not overwrite post-processed files; the post-processed files are overwritten by default')
     postproc.add_option(
         '--embed-subs',
         action='store_true', dest='embedsubtitles', default=False,
-        help='embed subtitles in the video (only for mp4 videos)')
+        help='Embed subtitles in the video (only for mp4 videos)')
     postproc.add_option(
         '--embed-thumbnail',
         action='store_true', dest='embedthumbnail', default=False,
-        help='embed thumbnail in the audio as cover art')
+        help='Embed thumbnail in the audio as cover art')
     postproc.add_option(
         '--add-metadata',
         action='store_true', dest='addmetadata', default=False,
-        help='write metadata to the video file')
+        help='Write metadata to the video file')
     postproc.add_option(
         '--metadata-from-title',
         metavar='FORMAT', dest='metafromtitle',
-        help='parse additional metadata like song title / artist from the video title. '
+        help='Parse additional metadata like song title / artist from the video title. '
              'The format syntax is the same as --output, '
              'the parsed parameters replace existing values. '
              'Additional templates: %(album), %(artist). '
@@ -747,7 +747,7 @@ def parseOpts(overrideArguments=None):
     postproc.add_option(
         '--xattrs',
         action='store_true', dest='xattrs', default=False,
-        help='write metadata to the video file\'s xattrs (using dublin core and xdg standards)')
+        help='Write metadata to the video file\'s xattrs (using dublin core and xdg standards)')
     postproc.add_option(
         '--fixup',
         metavar='POLICY', dest='fixup', default='detect_or_warn',