The first 5 seconds of your video is critical. It’s the hook that keeps people watching. Grab them, and you have given yourself the best chance they will listen to your message. Lose them, and the time and energy you put into your video is wasted.
This is the end:
Trailers usually take a while to build up. You know, starting with that booming James-Earl-Jones-style-voice-over and several incongruous images collaged together before they actually get to the point. This witty and childish intro was a clever add-on to an existing trailer. They referenced the fact we were watching an online video. And they played on their desperation to keep us.