I'm experimenting with video clips for the first time. I have captured a short video (hand held) using my Nikon D300s. This uploads into the computer as an AVI file. I have trimmed the beginning and the end of this video clip using ViewNX2 software and saved the result, as a MOV file (the only file type supported for output). I have created a simple test project in PTE (black slide, the trimmed video clip, black slide). When adding the video clip, PTE suggested that I should have the file conver