Does he still record in one take? I'm pretty sure that's changed over the last few years as his production has changed from "guy with phone camera" to "actually having a semblance of a a crew".
There's also changes in camera angle, cuts to other views, etc.
He's always been the "one take" guy for me. And it's not as easy as it looks--he'll spend 10 minutes wandering seemingly-aimlessly around London, and pass by a certain landmark within 5 seconds of mentioning it in his script (which he also memorized). It's bananas and I don't think many people even consciously notice. That's why he's so happy when he nails it. I think it's cute! https://www.youtube.com/watch?v=hgRRFRaMFcc
With a bit of practice, you can nail this too. The trick is to have a few seconds you can add or remove with some comment/fact which you can leave out for timing.
You'll often do it in regular conversation with people - if you're in a hurry for some reason, you can explain something to someone quicker by leaving out some less important details.
