You have no uploads, meaning the videos were never uploaded.
That's weird, I used the upload feature and it worked fine for me yesterday. Before anything, it verifies your YouTube information, and then proceeds to upload it.
Were you at a black screen with a red progress bar?
I would try putting in your YouTube details into Dirt 3 again, and try a really short clip to see if it works.
If you go to this link, the video should show up on the right hand side if they upload correctly:
http://www.youtube.com/massdomination#p/u