VP9 encoding/decoding support no longer properly advertised in RTP capabilities...
Pull request: https://github.com/WebKit/WebKit/pull/8517
Committed 258826@main (12eeaf78a6d4): <https://commits.webkit.org/258826@main> Reviewed commits have been landed. Closing PR #8517 and removing active labels.
<rdar://problem/104165795>