I have two kids, and on occasion I shoot iPhone video of them. If I capture something particularly compelling, I will cobble together a movie to share with the grandparents. The thing is, I do this just infrequently enough that I have to relearn my way around iMovie each time I go to stitch together a video.
With Adobe's VideoBite app, I may not bother with iMovie each time I want to create a video. The app is free and optimized for the iPhone 5. It also requires iOS 6. It worked just fine on my iPhone 4S, but there is no iPad version of the app.
VideoBite might just be the easiest video-editing tool I've ever used. Granted, it's so easy to use because it is very limited. If you want to add transitions, background music, a title sequence, or other annotations to your video, for example, you'll need to look elsewhere. If you want to create quick movie using snippets of the videos on your iPhone, however, VideoBite will do the trick.
When you first launch VideoBite, it'll ask to access your photos, by which it means your videos. Say "yes" and you'll soon see thumbnails of the videos on your phone. Tap a thumbnail to begin playing a video. Tap the heart button to begin highlighting a section of the video you'd like to use in your movie, then tap it again to stop highlighting. You can highlight multiple sections within the same video or from different videos. The thumbnails of the videos in which you have highlighted sections get an orange border. You can deselect them by tapping the checkbox on each thumbnail. You can also capture video using the app, but it's no different than shooting video with the native Camera app.
When you have your highlights ready, tap the orange button to view VideoBite's four menu options: Capture, Select, Arrange, and Share. Choose Arrange, which lets you drag to reorder your highlighted selections. To preview your arranged creation, tap the play button. Once you have everything all set, choose Share and VideoBite will create a video that you can either save to your Camera Roll or share on Facebook.
After creating a movie, you will need to clear your current highlighted selections before creating subsequent masterpieces. To do so, head to the Arrange view and tap the Clear all button.