hi, 1/ i'd like to use the same (short) intro and outro in all my videos. Is this something that has to be added in the final edit of your video in your editing software (iMovie, Final Cut Pro, ..) or can it be added (and changed at a later time) in Youtube? 2/ also, can you add thumbnails in youtube after the video is allready uploaded? (and change them t a later time?) 3/ are there any other variables that are best added in youtube instead of in your editing software?