Set it to the RE recommended settings of 0.08-0.1mm inlet and 0.23-0.25mm exhaust.
George made a mistake in that video, which is confirmed in the follow up video where he states the correct clearances (although confusingly he changes to imperial....3-4 thou and 8-10 thou).
In the second video he's discussing closing the clearances up slightly fir cooler climates.
I've had my TEC cam in now for 8000 miles with no problems. I use tge tighter end of the RE manual clearances, and the bike sounds fine. You can hear the tappets if you listen, but it's not excessive.
They've barely shifted since I fitted the cam.