Support streaming H265 over WebRTC

[bouk]

Describe the feature

Currently trying to stream H265 over WebRTC leads to the stream doesn't contain any supported codec, which are currently AV1, VP9, VP8, H264, Opus, G722, G711. go2rtc supports streaming H265 over WebRTC for Safari (with some caveats) and it would be cool if mediamtx also supported it!

[aler9]

This won't be done as it would benefit less than 5% of users and cause the remaining 95% to open issues in order to find out why H265 is advertised as supported but they cannot use it.

My advice is to switch as most as possible to a patent-free code like AV1 or VP9.