Actually, as the video and article point out, it's a two-centimeter-long robot made of magnets attached to dried pig intestines.
Photo credit: MIT
Quoted in Ingestible Origami Surgeon Could Be Coming 'Soon' To A Pill Near You. (Forbes, 5/24/2017)
"4 men and a beautiful girl". (1:31)
Fantastic Voyage was the 6th top-grossing film in the U.S. in 1966.