TL;DR
  • YouTube has confirmed it fixed the bug that was hiding videos from Watch Later and other playlists.
  • Affected users reported missing videos, ‘playlist does not exist’ errors, and broken playlists across mobile and desktop.
  • YouTube hasn’t said what caused the issue or whether an app update is needed, but affected users should now see their full playlists again.

Watch Later is one of those YouTube features you don’t appreciate until it stops working. It is the easiest way to stash a video you don’t have time for, build a queue for later, or simply keep track of something you don’t want to lose. So, having videos mysteriously disappear from the playlist over the past few weeks has understandably been frustrating for some users. The good news is that YouTube says the problem is now fixed.

YouTube confirmed the fix in a forum post earlier today, telling affected users that all their videos should now display correctly in their playlists, including Watch Later on the YouTube app.