youtube error 401

https://list-wiki.win/index.php/YouTube_Tests_New_Controls_for_Private_Video_Playback

You're trying to watch a video on YouTube and hit with a 401 error, meaning your authentication token has expired or gone invalid. This often happens if you were signed out or your login session got corrupted. Refreshing the page usually fixes it, but sometimes you need to sign out and back in or clear your browser cookies.