If you snap a photo in the app, you can theneditit using all of Android's built-in camera features (cropping, color balancing, photo filters and borders).
If you make a home movie and you want to editit and then record it to DVD so that you can send it out to your grandparents, you might as well write off an entire weekend, if not an entire month, to make that home movie.
If you give a speech, why not video record the whole thing and then release the whole video or editit into interesting chunks and put on your video blog.