@2davidc8 When I first visited youtube I saw some dance videos I wanted to watch again. I added them to my favorites, years later they look like they are still there in my favorites, but a couple of them are no longer on youtube.
Why an account becomes inactive I don’t know, but some are because the person repeatedly violated some youtube rule. I am currently subscribed to 119 youtube channels. It was more but I went through the list a couple weeks ago and found almost 20 that no longer exist.