OK, its working. Just must remember:

 sudo dnf swap ffmpeg ffmpeg-free --allowerasing

and

sudo dnf remove libavcodec-freeworld

My set:

Platform: Wayland
CPU Name: Intel(R) Core(TM) i7-3632QM CPU @ 2.20GHz
2 CPU Speed: 2893.375MHz
Physical Cores: 4, Logical Cores: 8
Physical Memory: 15795MB Total, 7953MB Free
Kernel Version: Linux 6.2.14-200.fc37.x86_64
Distribution: "Fedora Linux" 37
Desktop Environment: KDE (KDE)
Session Type: wayland
Qt Version: 6.4.3 (runtime), 6.4.3 (compiled)
Portable mode: false