Frusterated Blogger!

SO I have a pretty decent camera with a handy video attachment. For a few days now, I've been tryig to post some videos to my blog. I download them through google video and then click on post to my blog. After entering my personal id and password, it says that it can't identify me. I have done this numerous times, and it never works out. I even tried to copy and paste the link, and that didn't work out either. If anyone has any helpful info that would be fabulous! It really frusterates me and I guess I'm giving up unless someone can perform magic.