Include universal binaries of ffmpeg and ffprobe

Currently the official binaries of ffmpeg and ffprobe are intel only so to use it you need to have Rosetta enabled.

There are static binaries here:

https://gitlab.com/martinr92/ffmpeg

https://ffmpeg.martin-riedl.de/

And you can create universal binaries like this:

lipo -create path/to/x86_64/executable path/to/arm64/executable -output path/to/universal/executable