After some digging around at work, I found an old umatic VCR and watched the video taken on The Beast while construction was going on. This is the same tape that was on Ebay. The video is great and surprisingly really good quality.
It shows some of the queue line being built, water under the turn-around to the first hill, the old style train (4 cars w/ 4 seats = 32 ppl/ride), different color train (red in front to yellow in back- something that I never believed). Uncompleted 2nd tunnel- the beginning and end were cemented in but the middle part of the tunnel was open. And of course the 540 degree helix, which at that time was also not tunneled in. It also shows some video clips of the train running from the ground. It was really neat to see. There were workers all over the place leaning against the walkway beams (OSHA would have a hissy-fit over that), and the trees were REALLY tiny w/o leaves.
I should be able to make some copies if anyone is interested. I just hope the copied quality is as good as the original. After I make a copy and view it, I can let everyone know. I can almost guarantee this, this video is VERY unique. I want to write the company to see if they have a umatic tape of The Bat!