Been using KDE for nearly 7 years.
the KDE from impressive, to not so good. to now? total frustration.
13500HX, 16GB RAM, Intel Quicksync.
1 hour FHD, i can screenrecord to render with OBS, for the exact video lenght.
but using native KDE render, set to fast ( i see no ultra-fast from my KDE ), use all core.
- try many time. let it run 5 mins, all the same. take 4Hr ++++++ for rendering a 1 hour video.
time to give up.