I finally got my Tapo C70 camera to work using RTSP in the free Windows app "IP CENTCOM". I can view and record.

@Richard_T123 Weirdly, I managed to get my Tapo C70 to work with Agent UI using ONVIF, but then my internet disconnected one day, and I could never get it to work again with ONVIF or RTSP. But, I...