yeah sure if u have all the rights to host those videos in whole europe/germany its allowed

https://www.hetzner.com/rechtliches/cloud-server/?country=de

i know a couple people have naughty stuff on it (like sex toy shops, sexual services, private for sale adult videos)

hmmm why hetzner though? 100tb offers massive amount of bandwidth for tube sites I think.

do you know if Amazon S3 allows adult content?