[generic] Ignore some non-video file extensions during generic extraction (Closes #3900)
[mlb] Fix thumbnails extraction (Closes #3905)
[mlb] Remove unused import
[sportbox] Add extractor (Closes #3906)
[walla] Fix typo
Fixed typo
KeyError on initialising YoutubeDL in python3 #3910
[yahoo] Add support for regional subdomains and extract duration (Closes #3915)
[yahoo] Generalize, support arbitrary subdomains, support iframe videos, capture error message (Closes #2470)
[yahoo] Wipe out yahoo news extractor
Merge pull request #3911 from Dockheas23/master

KeyError on initialising YoutubeDL in python3 #3910