I think you lack understanding on what exactly is being patented if you are continuing to repeat the “it’s just math”.

I honestly can’t fathom why software engineers think that they are unique every patent, every invention is built on prior knowledge this is why every patent has a whole section of prior art we all stand on the shoulders of giants.

But again video encoding patents have rarely anything to do with software they are far more generic than that and also predate software by decades.

Here is one of the earliest examples of a video encoding patent I could find https://www.freepatentsonline.com/3679821.html

What exactly do you find here not to be worthy granting a patent for?