The short version: pick Faux Pause as your camera in FaceTime once, then press ⌥⌘F whenever you need a moment. Your video holds a clean frame. The camera light stays on. Nobody sees you leave.
Freeze holds one clean frame. Bad Connection stutters your last few seconds, so slipping away reads as a patchy line. Full Loop replays your last three seconds smoothly, for a little natural movement. Set a default under the menu bar icon; the shortcut triggers it.
No. To everyone else in the call, your video keeps playing. Instead of a black camera-off box, Faux Pause keeps sending your last frame, held still or gently looping. Your mic and screen share carry on.
A held frame reads as a still moment. Bad Connection and Full Loop add a little movement, so stepping away looks like a network hiccup. Either way it draws far less attention than switching the camera off mid-call.