Nice background image, though I’m not a fan of dark websites. You really should have a tag line or something that explains who you are and what you do – the "about me" is hiding, and really, take some time and tell us a little about yourself. What’s there now if laughable.
Clean up your nav – use consistent capitalization, etc. Don’t put Latest News in ALL CAPS – it’s harder to read. If you want visitors to come back for your video tutorials, you’ve got to come across as professional in your website presence. Nobody’s going to want to listen to a guy who can’t get the little details right. I’d dump the "Visit our Friends!" portion of the footer – it really makes it look like a "off-the-shelf" theme.
BTW, ubuntu rocks! Still waiting on the next LTS before I upgrade. Cheers!