I make some videos of math courses on the internet and some of them are in English. I want to find some where to upload it. Who can help me with this issue? I only know about Youtube, but that is stopped by the Chinese Great Wall. Any other places? (for maths or science is best)
It is really too bad google video no longer accepts uploads from the user community. The best I can do is to point you to wikipedia's entry on competing video hosting services and let you make up your mind which one is best for you. Good luck!
You could try this: http://www.videolectures.net