I think their point is to show what it's like to drive these vehicles on a daily basis.
From their video blurb:
We upload new videos every week that give quick insight into what our weekly test cars look, feel, and sound like when they're being driven joyfully
If by joyfully they mean "mostly slowly, but we'll give it the beans until we reach the local speed limit every so often" then they're absolutely delivering on that.
Otherwise, it's something of a wasted opportunity when you've got such a visual medium as Youtube to play with. Video, even POV-style video, isn't really
that good for relaying the sort of things you'd actually want to know about how a car is to drive on a daily basis - such as how it rides, what the NVH is like, whether the clutch will drive you crazy or whether the seats are comfortable.
I already know what cars are like to drive on a daily basis, and I don't just mean because of my job. Most cars are fairly similar at 30mph in a straight line. Modern cars particularly. Older ones are kinda like newer ones but with a slightly better ride and slightly better visibilty, but a bit more noise.
If someone gave me a helmet cam, some decent recording equipment and a fancy car to knock around in, and the task of giving Youtube viewers something to watch, I'm not sure driving around the suburbs is how I'd use them. I mean, the site/channel is called Winding Road, and most of the time the car isn't even being driven by someone with access to an actual winding road!