Thanks for explaining. I guess this would be comparable to e.g. Blu-ray key revocation. I suppose it’s possible but I’m not sure how likely it is considering the potential downsides, e.g. legal liability, for anyone doing this, compared to I’m not sure what upsides where there’s no profit to be found and all costs sunk

Oh no, I understood the watermarking concern. This sort of thing is famous with with Oscar screeners and electronic books. I was asking about OP’s suggestion that the font might be effectively withdrawn by a third party

Please excuse my lack of knowledge here. Am I under to understand from your post that software that you have purchased from another supplier will check from files that you have bought from this supplier and refuse to use them based on their attestation?

LOL, easier interface, sure, but:

HandBrake uses FFmpeg under the hood

Actually these days I would recommend using ChatGPT to get the ideal settings based on source medium and target quality/device