Video attempt - FRUSTRATING!

We've been trying to figure out how to get video on here and it's NOT WORKING. UGHHH!!! After 4 days of trying, we finally figured out how to get the videos from the camera to the computer...and then to play on the computer...but now they won't upload to this site (or any other video sharing sites for that matter). If any of you computer geeks have an idea about what might work, please share!!!