^ This: I just spent the ~20 minutes necessary to watch that part of the talk at a reasonable 1.5x speed, and that's the summary. Ffmpeg was suffering from 20 years of incremental change and lack of cleanup/refactoring, and that's what he's spent two years doing.

A couple of great lines including "my test for deprecating an option is if it's been broken for years and nobody is complaining, then definitely nobody is using it".