Then people will keep building tools like this. Which, there's nothing specifically wrong with, but rather it's clear there's a demand for ffmpeg-but-more-ergonomic and ffmpeg is in the best position to do that.
llm --yolo "combine all the files in videos/vacation in alphabetical order into a single video, do not use the audio from the videos, add the music from music/soundtracks/my-favorite-things.mp3 as background music, but a title at the front 'Our Summer Vacation'"
or something more involved. Yes, it might be able to spit out multiple commands
> llm -yolo "can you take input.mp4 and resize it to 720p, transcode to vp8 output to output.webm"
separate tools for separate jobs. ffmpeg doesn't need more features.