4. I wish RTCRtpTransceiver would allow reusing encoded MediaStreams instead of re-encoding. For video, dropped frames are acceptable without needing to renegotiate bandwidth.
A technique that's used to get around this is to use special frame reference pattern so some frames depend on a frame two or four frames before, allowing the intermediate frame to be dropped. This comes at a significant cost to the encoding efficiency though. tT use it with a pre-encoded video, it would require you to specifically encode it for this purpose, making the usefulness of such a feature in a client questionable.
Nothing stops you from building a server that does this though, for instance if you want to build a scalable streaming service based on WebRTC.
You missed the entire point of the comment.
And that’s a good one