Is it possible to get this working on another distribution like debian or gentoo ?
Sure, "just" pick patches from LE build system. Note, Kodi on LE does HW video decoding with patched ffmpeg and proper use of it. This probably won't work with random video player. I think that mpv needs only one small patch but I didn't try it in a long time. There is also an effort to make proper VAAPI layer which would be useful for most players but it currently doesn't work with latest kernel and wouldn't work with HW decoding improvements from LE without modifications. That's because kernel API for this kind of VPU HW is not yet stable and changes from kernel to kernel.