Very cool concept. I think you'll probably even get some good traction with it. Love the "sync" aspect of it that means everyone in a channel is hearing the same thing.

By the way, the fact that you're giving tools to people who listen to a lot of music on YouTube (most people in younger generations do) is solving a major problem. These people currently have few ways of creating playlists in ways that are intuitive to them and geared for music.