The YouTube Video Editor has been around for a while so why have I not come across it so far?
If like me you are not the greatest camera person, but unlike me don't have a team of film makers, you might like to try this. It's from Google and it's free. A word of warning, it can make your films look a little like they were captured on a CCTV camera. Otherwise it is simply amazing at making something amateurish look completely professional.