I've been having a lot of fun with claude to build one off cli's / tuis to solve my problems.
I had this same problem and I got claude to whip up my own version of this tool built out with makemkv, ffmpeg, imdb api lookups, LLM-selection of the "most likely to be the primary track", and plenty of other features. Really fun time to be building small bespoke tools for yourself.
If that's not too cheeky, would you consider sharing it?
It's incidentally a number three on my own backlog, so I'd rather spend this time learning more Python than addressing the exact problem you've already solved :)
I created a skill to write skills (based on the Anthropic docs). I think the value is really in making the skills work for your workflows and code base