i had just finish shooting my vacation video in hi definition using iphone4. quality was great. Sometimes i use imovie and this time i tried final cut express on my macbook air. I prefer to use imovie coz its faster and easier than FCP but then in final cut express, i can custom made the font to 3d font or anything i like. The question is- What is the best format for export and keep back up in future? i had tried fews and the best seems to be exporting to quicktime and choose format quicktime>h264 and the file seems smaller than the rest. For youtube, i will export again to export quicktime and choose Apple TV and seems is fits my requirement and the file size also smaller. Whats ur setting for backup in future guys? i believe must be the best quality coz in future we need to re-edit it.