The two UFOs were spotted in Haiti. As they flew overhead, the palm trees swayed and woman with the camcorder gasped. I watched the video three times. I gasped, too--it looked that real.
Watch the video a couple of times and see if you're convinced it's authentic:
UFO over Haiti
But wait, there's more. UFOs were spotted in the Dominican Republic too.
UFO Dominican Republic
So, are you a believer? I'm afraid I have bad news for you. A guy -- his YouTube name is OriginalDrDil -- went to great lengths in his video to show how the UFO video was rigged using Vue 6.

Palm Trees by way of Vue 6
But the Los Angeles Times thoroughly debunked the story, uncovering the creator of the videos, barzolff814. The Times reporter even convinced him to create another video.
Expose: Watch the famous UFO on the streets of Paris
You Believe in UFOs?
If you like UFO stuff (don't kid me, I know you do), spend a minute with Google Earth UFOs (or maybe weather balloons) and a couple of hours watching the videos on the Real UFO's site.