* allow RTMP streaming with codecid=av01 or hvc1
Prior to this change, when trying to stream AV1 over enhanced RTMP using
XSplit Broadcaster, the server was refusing the content with
"unsupported video codec: av01" message.
* add tests
---------
Co-authored-by: aler9 <46489434+aler9@users.noreply.github.com>