I have experienced the exact same problems as CuJo. I get error code 1576926719 when using the Roxie uploader. When I try to upload directly to YouTube, it's gets to 68% and then stops. Interestingly, I have been able to successfully use the Roxio uploader to upload to FaceBook.
I don't generally want my videos on FaceBook. I need to have them on YouTube.
So, Roxio uploader is not working, going direct to YouTube isn't working. What should I try next?