I am once again reminded that if you format literally anything into a Wikipedia article I will read it with full trust. "hmm surely there is a valid reason for there to be a cat with coins on this article about video file patents"
Even if all High Profile patents in Europe expire next year, this means absolutely nothing for US-based companies/orgs or companies/orgs that trade in the US, which still has patents that won't expire until 2027 according to this article. Even then, this means absolutely nothing because there is no such thing as a H.264 decoder/encoder that only supports the High Profile spec (aside from OpenH264, which already circumvents the patents for companies/orgs that want to use it, but is still lacking). x264 supports H.264 features from later specifications, and the patents for those things likely won't expire until after 2030.
On distros like Debian, openSUSE and Fedora, you need to enable a separate repository, if you want icky software, like proprietary drivers or patented codecs. In particular, you can't watch MP4 videos. So, PeerTube and YouTube work, but if a webpage is hosting its own videos, or you happen to acquire a video file in some other fashion, there's a good chance that it's an MP4 file and you can't look at it.
I'm hoping that when these patents expire, that it's possible to ship the MP4 codecs directly, and then at least for me, that would currently result in not needing to deal with these separate repos.
When I first switched to Linux, I was nonplussed at why many videos didn't work. It ended up being a positive learning experience, but it certainly would be nice if the codecs could be shipped directly, as you say.