I used video pad professional by NCH to put it together. The video is a mix of stuff we put together with a video phone and some purchased video. The song is about seven minutes long so there are many pieces put together. The editor is excellent so the transitions are clean. I initially had some still photos in a couple of places. Found out those are not allowed so replaced those with video. The file in an MP4 video. Resolution is 1280x720 with 50 frames per second which is much better than the minimum requirements. I wish they would specify where the problem is. With all the different clips included I have no idea where the issue is.