Usually that happens when there's an issue with the URL. Optional stuff in the URL field causes the issue for me, such as when someone shares a url with the "&t=" command to start the video at a specific timestamp. For playlists, it needs to have "playlist" in the URL, so I'll fix my examples.
I left off a tip as well: For getting a playlist URL for channels that don't have any specific playlists created, click their Videos tab, then at the top of the videos list "Play All", and on the next screen at the top of the videos list right click eg. "Uploads from DemolitionRanch" and you'll get a good URL to use. https://www.youtube.com/playlist?list=UUBvc7pmUp9wiZIFOXEp1sCg
Usually that happens when there's an issue with the URL. Optional stuff in the URL field cause the issue for me, such as when someone shares a url with the "&t=" command to start the video at a specific timestamp. For playlists, it needs to have "playlist" in the URL, so I'll fix my examples.
I left off a tip as well: For getting a playlist URL for channels that don't have any specific playlists created, click their Videos tab, then at the top of the videos list "Play All", and on the next screen at the top of the videos list right click eg. "Uploads from DemolitionRanch" and you'll get a good URL to use. https://www.youtube.com/playlist?list=UUBvc7pmUp9wiZIFOXEp1sCg
Usually that happens when there's an issue with the URL. Optional stuff in the URL field cause the issue for me, such as when someone shares a url with the "&t=" command to start the video at a specific timestamp. For playlists, it needs to have "playlist" in the URL, so I'll fix my examples.
I left off a tip as well: For getting a playlist URL for channels that don't have any specific playlists created, click their Videos tab, then at the top of the videos list "Play All", and on the next screen at the top of the videos list right click eg. "Uploads from DemolitionRanch" and you'll get a good URL to use. It's working for me but then I'm getting extraction errors today so I'll retest.