You're hooking up a generator..Get the thing retrofitted to LP and get at least a 100lb tank for it. Be nice if it was close enough to the heater that you could use it for both. Then bigger is better. uscarb.com has easy DIY kits for almost every genset.
The video is about what the 2A says and what it means. Not whether it’s adhered to.
At a minimum it destroyed the “but it means Xxx” arguments the anti-gunners use and paints them into the “we are just ignoring it” corner.