Hem's sake. Shed the audio entirely. Studios have more mics and more "channels than a civilian would believe, still add more content, later, after "mining" the live catch.
It is
not live-streamed in "real time".
KISS for smaller budget is to record a voice-over / machine-tool over.
Before OR after.
The motion vid - edited very simply - becomes but the background
filler to the well-crafted MESSAGE.
Once hired John Cleese to do a Cable & Wireless Commercial. Nothing to do with what he was "famous" for. Only that he WAS a widely recognizable figure and could capture the viewer's attention, then "present" very well. As he did.
You see it all the time with famous figures peddling inch-hoorance, reverse mortgages, vitamin pills, and .. would yah believe. their election to political orifice?
Works well-enough.
Cue "Guns of Navarone", "Life & Times of Judge Roy Bean", or 'Zulu" for voice-over intro or other examples done very effectively as attention "grabbers".
Example:
YouTube