Instead of talking vendors into supporting your particular protocol, wouldn't it be possible to use a protocol like picture-in-picture to extract the video stre

Instead of talking vendors into supporting your particular protocol, wouldn't it be possible to use a protocol like picture-in-picture to extract the video stream? https://github.com/w3c/picture-in-picture https://github.com/w3c/picture-in-picture I guess it doesn't handle the audio though.