This is the plugin I wrote for playing Bad Apple!! on sheep.

I didn't intend to make this a standalone plugin, so it's not the easiest thing to use.

The script to convert a video file is in the GitLab repository, where you'll find more usage information.

The main command is:

/rottenplayer <originx> <originy> <cardinal> <filename> [<pixelscale>] [<timescale>]