I could not get that to crash no matter what the settings. It seems it will only do vdpau with X11, not X11 Opengl. With X11 Opengl, it says
err: Operation not permitted
FFStream::decode: failed
HW device init failed, using SW decode.
but it works fine with X11 direct render.
With X11 Direct Render it will play 10 bit 4K60 at 60 fps. I have a Nvidia GTX-1050 with 2 GB on this computer. With the price of video cards, that is all there is going to be. I do have a GTX-1650 with 4 GB on another computer that runs Fedora 34, but that is the entertainment computer that is pretty much for watching the final result.
Regards,
Mark