Video Booth is a faithful clone of Apple's Photo Booth application, which allows you to add fun and silly effects to your photos and videos.
If you've ever used Photo Booth on a Mac, the interface of Video Booth will be very similar. Photos and videos output in the strip on the bottom of the app and clicking effects will bring up a 3 x 3 grid of different effects. There are a surprising number of effects to choose from, even in the trial application.
The effects that included are fun! There are color filters, fun hour mirror, and faux green-screen effects. They work well and produce some silly photos and videos for you to share with your friends and family, though I can see the novelty of Video Booth wearing off quickly.
Speaking of sharing, you can upload your Video Booth videos directly to YouTube. Unfortunately saving your photos and videos is not possible in the trial version, which is a bummer.
Overall, Video Booth is a good application to take fun photos or videos, but they really want you to buy the full version to experience all the features.