Youtube Data API v3 PlaylistItems update not working for Watch Later playlists

Question

Recently, the youtube.playlistItems.list doesn\'t fetch a playlist item that is suitable for the youtube.playlistItems.update when listing the watchLater playlist. Its works

Answer 1

Looks like the "bug" was just part of the transition period where YouTube planned to remove the ability to fetch the Watch Later and Watch History playlist through there API. As Tym commented the "bug" is/was tracked here: https://code.google.com/p/gdata-issues/issues/detail?id=8145 .

TLDR:

"Requests to retrieve playlist details (playlists.list) for a channel's watch history or watch later playlist will return an empty list after September 12, 2016. Requests to retrieve playlist items (playlistItems.list) in either of those playlists will also return an empty list after that time. This is true for the new values, HL and WL, as well as for any watch history or watch later playlist IDs that your API Client may have already stored."

https://developers.google.com/youtube/v3/revision_history#september-15-2016