Is that.. .is that asphalt with aggregate in it?
Yes, the kind that you make roads out of. Why would he be using anything else?
And why did he only show us a few seconds of scratches? I watched it a few times
If you watched it a few times, then you must have heard him a few times when he said he's got more details in his other video (the one markjo linked), and this one is just for laughs.
Aggregate is what scratched it. I'd like to see him try that shit with PURE asphalt. Which, according to the table of hardness, is much softer than glass. But let him ignore such scientific details.
Why? It would have absolutely nothing to do with actual roads. It'd be an exercise in futility.
I got through about 3 minutes of that video and noticed he is once again using retail price as well as assuming 100% conversion right off the bat. He also assumes every LED will be on 100% of the time for his energy use calculation, when you can probably figure roughly 50% of the LEDs on a panel may be turned on at the same time, and not every panel in America would be on all the time. Plus his voice is annoying.
He already assumed 50 LEDs per tile, so that's your main concern covered. But hey. Slash all of his numbers by a factor of 100. Guess what? Still doesn't help.