And, realistically, I don't think anyone actually wants patent-encumbered video codecs; we're just stuck with them because bad patent law has allowed companies to have a monopoly over math, hurting the quality of unencumbered codecs, and because the patented codecs have wormed their way into standards so that they're required for interoperability.
This court is famous for being a racket. Previously on HN: https://news.ycombinator.com/item?id=30135264
That's a lot of things the European Patent system is supposed to prevent, and exposes quite a number of loopholes.