If ffmpeg is a requirement but not included in your repo, isn’t that ok? I haven’t installed it, I’m waiting for 1.7 before I jump in, but if compiling from source wouldn’t you need ffmpeg anyway?
I guess I’m confused what the legal issue is if your repo does not include ffmpeg but simply requires it the same as compiling from source. Or is the issue that panda3d is compiled using ffmpeg source files not separately installed libs/binaries?