Wow, I've got to say I'm impressed that you're so open with the redesign of the site. The transparency is appreciated. I will also say I miss the grids of new/trending music videos. That was a huge reason why I kept coming to this site. It was an easy way to discover an array of current/new-to-me music. So, I hope that feature comes back or, if it's still there somewhere, it becomes more noticeable. It was convenient on the homepage.
The trending vids on the old version is basically the same as the two row version you see now below the trending news. How it determines trending videos work the same way, the only difference is that it's more separated by genre now.