I was working on a YouTube movie maker project as usual.

Suddenly after closing and opening again probably three times because it kept replacing the clips with a warning sign (the sign that comes up when it can't find the files), despite the fact that the camera USB was still connected and nothing had changed. It has done this before by the way.

Then after opening it everything was deleted and was replaced with a scrolling line, you know the one that is where you are playing.

I couldn't play or pause, those buttons were grey and unable to click. I tried again and the scrolling line just got bigger then smaller. The only thing that remained showing the clips was the bottom left part where it says how many of those square boxes or items are in that movie maker project.

I keep trying but the same result happens, what should and what can I do?

Please help, I need this YouTube video up ASAP.

(Oh and I have tried troubleshooting it and that didn't work.)