yeah I remember learning this trick in like 2007 with libaa and later caca for color.
It looks like this app is shelling out to ffmpeg to get the bitmap of a frame and then shelling to something called chafa to covert to nice terminal-friendly video.
Collaboration slows things down but going fast at all cost leads to tech fragmentation, tech debt, and product debt.
fwiw I'm not in the camp of "we must have everything done in one consistent way" but there are places, for example a public API, where having 4 different names for the same concept, 3 different response format/url path styles, etc. starts to look really sloppy.