Hi there,
longtime happy user of Recalbox here.
I use the included Kodi media player quite a bit and noticed that apparently since 8.x.x versions there is no more HW acceleration for videos enabled.
I just updated my RPi 4b+ to 8.1, at least h265 is unwatchable and completely sluggish. h264 seems to work but i fear this is decoded purely in software.
My RPi 3b+ is still on 8.0.2 and has the same issue. Of course no h265 HW support on the 3b+, but h264 is sluggish and unwatchable.
Hope this isssue can be fixed, especially since it used to work on older versions of Recalbox (pre-8.x.x that is)