

H.265 is patent encumbered. Blame the 2 or 3(?) patent pool holders (for-profit corporations, unlike non-profit -and-slowly-losing-market-share Mozilla) for not making it free to use for everyone.
This is why AV1 is preferred, it saves bandwidth and there’s no threat of being sued into oblivion.
it’s only gotten better. now you can run it in your browser and play local files
https://webamp.org/