[unity] Add extractor (fixes #14528)

youtube_dl/extractor/extractors.py

@@ -1138,6 +1138,7 @@ from .udn import UDNEmbedIE
 from .uktvplay import UKTVPlayIE
 from .digiteka import DigitekaIE
 from .unistra import UnistraIE
+from .unity import UnityIE
 from .uol import UOLIE
 from .uplynk import (
     UplynkIE,

youtube_dl/extractor/unity.py

@@ -0,0 +1,32 @@
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from .youtube import YoutubeIE
+
+
+class UnityIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?unity3d\.com/learn/tutorials/(?:[^/]+/)*(?P<id>[^/?#&]+)'
+    _TESTS = [{
+        'url': 'https://unity3d.com/learn/tutorials/topics/animation/animate-anything-mecanim',
+        'info_dict': {
+            'id': 'jWuNtik0C8E',
+            'ext': 'mp4',
+            'title': 'Live Training 22nd September 2014 -  Animate Anything',
+            'description': 'md5:e54913114bd45a554c56cdde7669636e',
+            'duration': 2893,
+            'uploader': 'Unity',
+            'uploader_id': 'Unity3D',
+            'upload_date': '20140926',
+        }
+    }, {
+        'url': 'https://unity3d.com/learn/tutorials/projects/2d-ufo-tutorial/following-player-camera?playlist=25844',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        webpage = self._download_webpage(url, video_id)
+        youtube_id = self._search_regex(
+            r'data-video-id="([_0-9a-zA-Z-]+)"',
+            webpage, 'youtube ID')
+        return self.url_result(youtube_id, ie=YoutubeIE.ie_key(), video_id=video_id)