I just installed fedora a couple of days ago and this happens to me too…

I guess I’ll try a different distro 🤷‍♂️ it was being a nice experience until I tried to play a video

insteall it from dnf, not flatpak

The Fedora documentation has the answer: Installing plugins for playing movies and music

Fedora (combined with RHEL) has great documentation, take an hour, read the docs and you’ll have a great experience.