i have the following one from ebay seller :

Back to the Future: Ride + Leslie Nielsen documentary

1) BACK TO THE FUTURE - BEHIND THE SCENES WITH LESLIE NIELSEN (29:00 minutes)
This exclusive television special aired in 1989 and was hosted by Leslie Nielsen. He was filmed at the famous Clocktower set at Universal Studios Hollywood that has completely burned down in the recent fire. The special was used to promote Back to the Future Part II during "Back to the future event" on NBC It's also the source of the infamous "hoverboards are real" urban legend that still haunts Mattel Inc. The footage was taken off master VHS tape (no broadcast logos) and is of excellent quality for such source.

2) BACK TO THE FUTURE - THE RIDE (11 minutes)
One of the best movie rides of all time! This DVD contains footage from Electronic press kits from Universal studios in California, Florida and Japan. If you ever saw any worldwide TV newsreports, this is where the raw footage was taken from (behind the scenes, interviews...). Sourced from proffesional broadcast BetacamSP masters and DVDs.