I did watch that video and the only comment I have is to be vey careful wedging your foot into the bars for resting on, as the requirement to get your foot on the pegs in a heartbeat could be hampered by you catching your foot (feet) as you try to quickly have braking/gear control.
I noted the video rider is totally oblivious to wearing anything resembling proper riding gear too. That's not uncommon, of course, but those types have to learn the hard way sometimes, what skin looks like after it has slid down the road for 100 feet.
You make a great point about possibly getting a foot caught. I will definitely have to see what it's like, would not want to get caught in a situation like that.
And as someone who slid down the road when I was 19, and learned the hardest way, I've worn wear full riding gear at all times since - helmet, jacket, steel-toed boots, gloves (unless just puttering around the neighborhood). It kills me when I see someone here riding down the road wearing shorts, flip flops (yes, seen that more than once), no helmet - makes me cringe.