[discovery] Add support for Scripps Networks watch domains(closes #17947)

youtube_dl/extractor/discovery.py

@@ -17,16 +17,29 @@ from ..compat import compat_HTTPError
 
 
 class DiscoveryIE(DiscoveryGoBaseIE):
-    _VALID_URL = r'''(?x)https?://(?:www\.)?(?P<site>
-            discovery|
-            investigationdiscovery|
-            discoverylife|
-            animalplanet|
-            ahctv|
-            destinationamerica|
-            sciencechannel|
-            tlc|
-            velocity
+    _VALID_URL = r'''(?x)https?://
+        (?P<site>
+            (?:www\.)?
+                (?:
+                    discovery|
+                    investigationdiscovery|
+                    discoverylife|
+                    animalplanet|
+                    ahctv|
+                    destinationamerica|
+                    sciencechannel|
+                    tlc|
+                    velocity
+                )|
+            watch\.
+                (?:
+                    hgtv|
+                    foodnetwork|
+                    travelchannel|
+                    diynetwork|
+                    cookingchanneltv|
+                    motortrend
+                )
         )\.com(?P<path>/tv-shows/[^/]+/(?:video|full-episode)s/(?P<id>[^./?#]+))'''
     _TESTS = [{
         'url': 'https://www.discovery.com/tv-shows/cash-cab/videos/dave-foley',
@@ -71,7 +84,7 @@ class DiscoveryIE(DiscoveryGoBaseIE):
 
         if not access_token:
             access_token = self._download_json(
-                'https://www.%s.com/anonymous' % site, display_id, query={
+                'https://%s.com/anonymous' % site, display_id, query={
                     'authRel': 'authorization',
                     'client_id': try_get(
                         react_data, lambda x: x['application']['apiClientId'],