I had to dig for this so I thought I might post it here in case people didn't think it could be done. Videobuzz appear to have been relentlessly pursued by Youtube to prevent them allowing you to view Youtube via their channel on your Roku box. They went from regular Roku channel to private channel to sideloaded app to evade Youtube's lawyers. Heck, Google even made an Xbox app.

To view Youtube on your Roku in this democracy of ours you need to download the app from here http://www.myvideobuzz.in/ and sideload from your computer. End result? you can watch Youtube on Roku. :)