Intended use case for "preview": you get a burn link from someone, you don't know any of the songs, and you want to sample many in a short time. It's not selected by default because I imagine it's not what most people want. Maybe it plays too prominent a role on the page.

I really wish I could play songs without the video, but other music sites have gotten in trouble trying.

How would people feel about "add album" and "add random related songs" buttons?