These are some really great looking premium video blogging WordPress themes. You can check them out if you intend to get one or even get some UI and layout inspiration to make your own.

Quommunication Video

quommunication video 3 Great Premium WordPress Themes For Video Blogging

tv.Elements

tvelements 3 Great Premium WordPress Themes For Video Blogging

VideoFlick

videoflick 3 Great Premium WordPress Themes For Video Blogging