If you get a e-mail/password error when you try use Google’s Desktop Video Uploader, then try going to this page, which displays an captcha to unlock your account. I’m not quite sure why my account was locked in the first place (as I was able to login to other Google services), but going through that page seemed to fix it. There is more information available here.
even this didnt work for me, i cant login to google video uploader 🙁
tried this five times, still didn’t work, even tried uninstalling and reinstalling uploader. 🙁