What is this & why! PM8 Private Movie Projector Viewer Super 8mm Vintage sexy home movies on the go?

#vintageelectronics
UPDATE: I just got a new belt and it is working much better. It is fussy to set up but I was surprised that with the new belt it takes up the film much better than shown in this video.
Sold on eBay for $39.50 + shipping (2023).
I sell fun stuff like this on eBay www.ebay.com/u...
Demo of the M8 Movie "Projector" which is really a movie "viewer". Why it was made I'm not sure. But check it out and see how it works. Fun vintage item for sure! Complete and in box!
David