diff --git a/cps/constants.py b/cps/constants.py
index e697e048..bbede0a7 100644
--- a/cps/constants.py
+++ b/cps/constants.py
@@ -143,14 +143,15 @@ del env_CALIBRE_PORT
 
 
 EXTENSIONS_AUDIO = {'mp3', 'ogg', 'opus', 'wav', 'flac', 'm4a', 'm4b'}
-EXTENSIONS_VIDEO = {'mp4', 'avi', 'mkv', 'webm'}
+EXTENSIONS_VIDEO = {'mp4', 'avi', 'mkv', 'webm', 'm4v', 'mov', 'wmv', 'mpg', 'mpeg', 'flv', '3gp', '3g2', 'ogv'}    
 EXTENSIONS_CONVERT_FROM = ['pdf', 'epub', 'mobi', 'azw3', 'docx', 'rtf', 'fb2', 'lit', 'lrf',
                            'txt', 'htmlz', 'rtf', 'odt', 'cbz', 'cbr']
 EXTENSIONS_CONVERT_TO = ['pdf', 'epub', 'mobi', 'azw3', 'docx', 'rtf', 'fb2',
                          'lit', 'lrf', 'txt', 'htmlz', 'rtf', 'odt']
 EXTENSIONS_UPLOAD = {'txt', 'pdf', 'epub', 'kepub', 'mobi', 'azw', 'azw3', 'cbr', 'cbz', 'cbt', 'djvu', 'djv',
                      'prc', 'doc', 'docx', 'fb2', 'html', 'rtf', 'lit', 'odt', 'mp3', 'mp4', 'ogg',
-                     'opus', 'wav', 'flac', 'm4a', 'm4b'}
+                     'opus', 'wav', 'flac', 'm4a', 'm4b', "avi", "mkv", "webm", "m4v", "mov", "wmv", "mpg",
+                        "mpeg", "flv", "3gp", "3g2", "ogv", "jpg", "jpeg", "png", "gif", "bmp", "tif", "tiff"}
 
 
 def has_flag(value, bit_flag):
diff --git a/cps/static/css/style.css b/cps/static/css/style.css
index 0bab5b53..fcb05cde 100644
--- a/cps/static/css/style.css
+++ b/cps/static/css/style.css
@@ -147,8 +147,11 @@ table .bg-dark-danger a { color: #fff; }
 .cover { margin-bottom: 10px; }
 
 .container-fluid .book .cover {
-  height: 225px;
+  height: auto;
   position: relative;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 }
 
 .author-link img {