I recorded a screencast of a presentation I made in Keynote using ScreenFlow. The aspect ratio of the presentation was 1024x768. I did the presentation full-screen on a 23" LCD, so there was a lot of black space around it. Of course YouTube now features widescreen player windows. So when I tried uploading my screencast directly from ScreenFlow, it looked awful. Black bars on the side, and distorted main area. Is there anything I can do about this now? Or would it be best to go back and create a new Keynote presentation with the aspect ratio that YouTube likes, and re-record? Thanks.