Replying to Problems uploading Video's?

I wasn't really sure who to pm for this, so decided to just make a thread.
I've tried to upload a short edit I made a few times now, and always end up with the same result. My internet is really slow, so I'll hit the upload button and see the uploading media symbol, then when I come back it's at the original uploading page telling me about how I should upload to NS instead of using other video hosting sites. I uploaded a video once a while ago, but don't remember it doing anything like this. Help please?