A walk-and-talk asks you to do three things at once: move, speak from a script, and show the thing you are speaking about. Most people manage two, stop the recording, turn the phone around, and start again — which is why so much of this footage has a visible cut every fifteen seconds.
Set the prompter to cover the screen. You are not watching yourself while you walk; you are reading. The camera keeps running behind the words, and you can see enough of the frame through them to keep yourself in shot.
When you reach the thing you want to show, switch cameras rather than stopping. The recording continues, the file stays whole, and you can keep reading through the switch. Flip back when you want your face in frame again.
One practical note: give yourself a beat of silence before and after each switch. Not because the recording needs it — it does not — but because it gives you a clean place to trim if you decide later that the switch came too early.
