Pick a short video or a photo of a face. Your character copies the head turns, nods, blinks and mouth. The file is read on this device and never uploaded.
Stream window: follows this tab live. In OBS add a Window Capture of it, then a Chroma Key filter (green).
OBS link: in OBS add a Browser source, paste the link, size 1080×1080. It reads the webcam itself, so start OBS with --enable-media-stream.
For Zoom, Meet or Discord, press Start Virtual Camera in OBS.
Live webcam is blocked inside claude.ai pages, so record yourself first (a phone selfie video works) and pick that file here.