I'm taking offers for this unusual item via PM: this HD video was provided by Sony to select media outlets at the PlayStation Move announcement on 3/10/10, during the Game Developer's Conference in San Francisco. The tape contains the very first video footage of the PlayStation Move in action:
The tape and box both include the PlayStation Move logo and the date of the announcement. The tape itself is on Sony-brand HDCAM-SR media. Unfortunately, I do not have the equipment to play it so I cannot verify specifically what footage is on it.
Shoot me a PM if you're interested in it!