Comment by max_

I actually found several of the deleted YouTube videos on archive.org, but it was pretty hit or miss and was mostly the older ones.

For personal copies of videos I want to keep incase of deletion, I generally look to yt-dlp.

Using the wayback machine can work if you have the exact video link, but it's not guaranteed that they'll have it

You can occasionally find a torrent out there of some channels entire video log

Other than that, no

If you come across a video that you really want to save, just use ytdlp to download it