Vocal is a podcast manager designed to integrate tightly with the elementary OS desktop, which supports both audio and video podcasts, with built-in video playback.

If you are thinking of building a blog mostly with videos, the new free theme designed by Sarah Neuber especially for Smashing Magazine called Smashing Multimedia has to be the best I've seen. The theme is just... impressive and comes with all associated PSD files which is great when it comes to adapting it to your needs.

The theme is also a great choice if you want to build a portfolio or a photo blog, and includes options in the Wordpress dashboard which makes it very easy to customize.