If you want bleeding edge functionality, link against git versions
of FFmpeg or if a package for your platform is not available or
updated, you can build mpv from source code. The helper build
scripts are recommended for most users since they perform a static
build of FFmpeg and libass as well as mpv.
Distributions usually package outdated, unmaintained, and unsupported versions of mpv. This is especially
true for popular distros like Debian and Ubuntu. You are recommended to use
mpv-build or third-party packages instead. All of these packages are unofficial.