Ok, first I'm from Egypt. When I try to share a video from video.google.com through their sharing widget it sends me to google.de/s2/sharing/widget and I found that I need to sign in, even that I already did on google.com when I click on sign in it sends me to the sign in page but it's in German. And when I tried to share it though the widget by sending email, it asked me to do the word verification which I did then I got an Invalid API Key error.

Here's a screenshot:
http://img88.imageshack.us/img88/8076/videoly6.jpg

And that's the German login page:
http://img152.imageshack.us/img152/7848/germanvs6.jpg

*I tried it from another computer and it redirects to google.fr

Try to clear your cookies and cache. Then do a restart of your Browser

I did, I even tried that on 2 different computers in the same place and now from another 2 computers in a different place and the result is the same (expet it now redirects me to .fr instead of .de). I use noscript and when I visit video.google.com it asks me to allow google.fr?