I am collecting hard to find art house stuff. So I have redundancy, but no backup. If your collection is easy to redownload I totally would use the interwebs as my backup.

I wrote a bunch of scripts that for each file I got from bittorrent, it removes it from the daily backups, and instead has a log of what file goes where and what torrent it came from. I've actually had to use it's restore function a few times because I'm trigger happy and sometimes ruin my server. One of these days I will clean up the script and make it portable...

For pirated movies, I meaaan... linux ISOS, is fine not to have backups cause as you said you can re-download them. My SSD with all my jellyfin media died recently and it kinda sucked but at least I didnt lose anything important.

I guess most people in this sub that have redundancy with their media is because they rip the movies out of blu-rays they bought rather than download it. I also save copies of my ripped (legally) videogames.