I recently stumbled on the febon rtmp to hdmi adapter (https://www.febon.net/products/febon-local-ethernet-rtmp-to-hdmi-adapter). Looks somehow promising. Especially for doing webinars and keep your usb-port free for recording (instead of using it for the webcam). And the latency of 200ms seems pretty sweet.
Does anybody have experience with this product or the company? I’m not sure how trustworthy it is.
Another Idea would be, if someone creates an rtmp to webcam (usb) adapter. That would solve all my problems and I would be the happiest man alive Maybe somebody knows somebody how can do this?