>>82850453
>Bookmark is unreliable they can change username.
Has happened before but Google seems to keep track of this stuff. Usually I google their old username and I get a link to a video of them. Then the URL changes to show their new username and I bookmark that and delete the old one.
And yea, I download the videos I like immediatly with yt-dlp or urlebird and add them to my collection that gets backed up every week.