What I don't like about the Oh the Urbanity! videos is their complete lack of ...class perspective. For them it's about supply and people's choices. There is no space for like, power relations in the urban space, and there is no understanding that density can also be a repressive power. There are places in the world (where many immigrants to Canada come from) and places in Canada where density is a signifier of poverty, bad services, lack of green space and overall bad quality of life. Without addressing this simple fact, they end up sabotaging their very valid arguments and come off as annoying smarmy neoliberals.
I'm not of course saying that poverty and density are necessarily coupled. In Canada some of the worst poverty is at some of the least dense areas (indigenous reservations ).
What I'm saying is that there is a good density and there is bad density. But good density requires a strong welfare state to put in place shared public amenities. And that's completely missing from these videos. Instead somehow "satisfying demand" will fix things alone.
Again, it's not as if suburban planning addresses any of the social problems. But it being the default in North America means that it already occupies a strong ideological position in the public imagination. The imaginary "benefits" of suburbanity are part of the default thinking, of the existing ideological hegemonic paradigm.