Are you using Fedora Workstation? Have you installed "additional" multimedia codecs?
The issue with Fedora is that because of being backed by RedHat, they fear using some software for their licensing. So, to use features of your GPU you paid for, you need to install codecs from RPM Fusion.
This can be an hussle when big version updates of Fedora comes and you need to wait for RPM Fusion repo to catch up.