This is called being "married to the bit." He's fully in on the joke. Words like "cosplay" tell you all you need to know. He's probably in his late 30s/early 40s and so grabbing a piece of something he'd never had a chance to experience.
And, yeah, to normal people, most of us look like him, even if we eschew period-correct garb. But why would you? I have the goggles and the Snoopy hat. Like him, I drive around wearing that getup when the weather requires it.
What else can you do?
Full endorsement. I think I need a helmet like his.
The vid is great, like all of these vids. But they all have the same weakness: by focusing so obsessively on the car and the driver, they omit the social experience. You guys all know that solitude is a very difficult thing to achieve when driving something like this.
And once you park? Forget about it!
The reality is, these things are a social icebreaker par excellence. Shyness disappears. It's like stepping out with a movie star or a supermodel—except you don't have to worry that some other dude will catch her eye.