Draw on live video, together. Start a session and send the link. Whoever's on site shares their camera; the other person draws on it. Two-way voice is built in.
Next, if you're the one on site, tap 📷 Share my camera.
Send this link to the other person:
Waiting for the other person to join…
If you're on site, share your camera so the other person can draw on what you see.