I tried to open one of my (private) youtube video’s. After the pending / waiting circle , I got an error message

An error occurred. Please try again later. (Playback ID: y1-eitEiwL5abidc)
Learn More

In the link, Youtube gives me one reads causes for errors like

  • An error has occurred.
  • Playback error. Tap to retry.
  • Connection to server lost.
  • This video is unavailable.
  • Something went wrong. Tap to Retry.

 
Perhaps Internet Connection.

Though that seemed not to be the cause on my end, I tried another browser and there it seems ok. Also I tried incognito mode, there it works as well. So perhaps because I am logged in or caching (restarting the browser did not help btw, also hard refresh Ctrl + F5 did not help).