Thumbs down to this app

Not to be rude but... This app completely deleted our whole YouTube video and all our hard work we have been working on for 3 days. It was great then all the sudden the screen turned black and completely glitched up the music. We put the phone to sleep but it was still all whacked up, it is called "iMovie" but it wont take longer than a 10 minute video. I do not recommend video deleting app. ?

Sophia and Rachael about iMovie, v2.2.3