Allbot 2 Legs won't stop falling over

This bot looks good but can’t keep from falling over. It isn’t balanced very well and any sudden movement causes him to fall over. What can be done to fix this problem???

Could you post a video of the allbot?

There is no way to post a video or upload any attachment. I have video to upload but where do I do it to?

Maybe you could upload it to YouTube and post a link here?