I think it is technically possible - with the Valve Index you can read the camera input like a webcam, and I’m sure theres some way to do it with the Quests (although probably not easily). That said, as others have noted, between the bulkyness of the headset, the lower quality of the cameras, the risk of losing tracking, and the natural shakyness of people’s heads, it likely wouldn’t be an improvement. Try watching VR footage from someone who doesn’t stream/video it regularly and you can get an idea of how hard the footage can be to follow, even before the lower camera quality.