I didn't see the video because I have stupid dial-up, but we went on Space Mountain with the lights on a few weeks ago. It was the first time in 10 years that I was on it, and the first time ever for my DS, and during the whole ride I kept saying "This doesn't look right, it's supposed to be dark!" The ride was horrible with the lights on. It seemed to go so slow.
After we rode, they shut the ride down. Finally, the next day I was able to ride it in the dark. Ahhh, much better!