Some people use it compiled locally.
I'll add the required packages to the tree on day, I promise.
Package-Manager: Portage-2.3.19, Repoman-2.3.6
$(usex libmpv "$(use_enable opengl plain-gl)" '--disable-plain-gl')
--disable-mali-fbdev # Only available in overlays.
$(usex opengl '' '--disable-gl')
- --disable-vulkan # Requires glslang and spirv-tools packaged.
- --disable-shaderc # Only available in overlays.
# HWaccels:
# Automagic Video Toolbox HW acceleration. See Gentoo bug 577332.