The problem is that open codecs can still be encumbered by patents and the holders will sue. VP9 and AV1 have their own patent pool for that very reason. Google may have open sourced its codecs but if they don’t indemnify users people who think they’re safe might be in for a bad time.

Looks like that isn't stopping Dolby.

https://www.techspot.com/news/111865-dolby-sues-snap-over-vi...