I thought about posting on BuyCanadian but I was worried they would find it off-topic as that place is more focused on products. (e.g. Not so a place for talking about a Canadian book you read recently.)
That's a good point about splitting it up between the different locations. EhVideos seems like it has the shows/movies/old commercials covered. MapleMusic would work if I wanted to talk about Unleash the Archers or something like that.
I'm not necessarily opposed to creating one, though.