Hi, you probably don’t know me, but I had to reach out and say thank you for your post:
Tubeify

It sums up what I wanted achieve when I started coding on Tubeify.
I wrote it to be what I always wanted in a music player and it thrills me that you enjoy discovering music in Tubeify as well.

As for legal issues, YouTube has an ASCAP license that covers all YouTube content including that embedded in other sites.
I hope the record labels won’t block Tubeify but instead enable YouTube ads to increase the amount artists are paid per view.

Again, thank you for your blog post, it really makes me excited about improving the service.

Tomas Isdal
Tubeify, Inc.