BCpov (MTB rides as well as some trail building stuff)
Shifter (informative videos on various topics relating to cycle commuting)
One Cyclist in Lisbon (pretty much what it says on the tin, lots of silly city cycling moments in his compilations and as well as longer rides outside Lisbon)
Not Just Bikes is such a good channel, I share their video on winter cycling in Oulu pretty regularly since I live in a snowy place where people think I'm insane for cycling in the winter!
However, like you said, I consider them more of an urbanism channel than cycling-specific.
I can vouch for Not Just Bikes. Fascinating, high quality content. If you are into urbanism and bikes take a look at Oh the Urbanity! as well. He bike commutes in Toronto and talks about city design.
Cade Media (née Francis Cade) is lots of fun, he does a bunch of tours across various countries and continents, and also just has fun with his friends goofing around with bike stuff.