[formula1:f1tv] Add extractor (closes #20374)

Signed-off-by: Konrad Gräfe <konradgraefe@aol.com>

docs/supportedsites.md

@@ -272,6 +272,7 @@
  - **Expressen**
  - **ExtremeTube**
  - **EyedoTV**
+ - **F1TV**
  - **facebook**
  - **FacebookPluginsVideo**
  - **faz.net**

youtube_dl/extractor/extractors.py

@@ -361,7 +361,10 @@ from .flickr import FlickrIE
 from .flipagram import FlipagramIE
 from .folketinget import FolketingetIE
 from .footyroom import FootyRoomIE
-from .formula1 import Formula1IE
+from .formula1 import (
+    Formula1IE,
+    F1TVIE,
+)
 from .fourtube import (
     FourTubeIE,
     PornTubeIE,

youtube_dl/extractor/formula1.py

@@ -31,3 +31,59 @@ class Formula1IE(InfoExtractor):
             r'data-videoid="([^"]+)"', webpage, 'ooyala embed code')
         return self.url_result(
             'ooyala:%s' % ooyala_embed_code, 'Ooyala', ooyala_embed_code)
+
+
+class F1TVIE(InfoExtractor):
+    _VALID_URL = r'https?://f1tv\.formula1\.com/en/(?:[^/]+)/(?:[^/]+)/(?P<id>.+)'
+
+    _TESTS = [{
+        'url': 'https://f1tv.formula1.com/en/current-season/singapore-grand-prix/2019-singapore-grand-prix-race',
+        'info_dict': {
+            'id': '2019-singapore-grand-prix-race',
+            'ext': 'mp4',
+            'title': '2019 Singapore Grand Prix Formula 1 Race',
+        },
+        'params': {
+            'format': 'bestvideo',
+            # m3u8 download
+            'skip_download': True,
+        },
+    }, {
+        'url': 'https://f1tv.formula1.com/en/current-season/singapore-grand-prix/2019-singapore-grand-prix-race',
+        'only_matching': True,
+    }]
+
+    _API_BASE = 'https://f1tv.formula1.com/api'
+
+    def _real_extract(self, url):
+        slug = self._match_id(url)
+
+        metadata = self._download_json(
+            self._API_BASE + '/session-occurrence/?slug=' + slug + '&fields=session_name,channel_urls&fields_to_expand=channel_urls',
+            slug
+        )
+        metadata = metadata['objects'][0]
+
+        # Select world feed perspective
+        for channel in metadata['channel_urls']:
+            if channel.get('name') == 'WIF':
+                channelUrl = channel['self']
+                break
+
+        channel = self._download_json(
+            self._API_BASE + '/viewings/', slug,
+            headers={'Content-Type': 'application/json'},
+            data='{"channel_url": "' + channelUrl + '"}',
+            note='Downloading JSON channel info'
+        )
+
+        formats = self._extract_m3u8_formats(
+            channel['tokenised_url'], slug,
+            'mp4', 'm3u8_native', m3u8_id='hls'
+        )
+
+        return {
+            'id': slug,
+            'title': metadata['session_name'],
+            'formats': formats,
+        }