SOLVED: Trickplay enabled, but not working

[RostigerSpieler]

Can you post your full jellyfin logs to pastebin and link back here?

What you're describing is not typical.  I have several Jellyfin instances.  My main instance is running directly on Ubuntu (Intel Arc GPU).  And my test instances are running in Docker on Ubuntu (Intel GPU), Docker on PopOS (AMD RX6800 GPU), directly in Windows (AMD GPU), and Docker in Unraid (AMD GPU).  None behave like you've described.

So let's leave the hyperbole at the door and try to figure out what is going on.

Log was to big for pastebin. Here the log.txt via wetransfer. I hope that is ok

https://we.tl/t-sUWTvqo07s