It's a clip from "The World's Biggest Footjob Gangbang" ... a mid-1990s flick starring Brittany Andrews.
The title is a big of a misnomer ... there's very little footjob action and isn't really a gangbang in the truest sense of the word ... just a series of about 100 guys who wait for a turn to get their cocks played with by Brittany and/or one of two fluffers until they are ready to jerk off and cum in those transparent vinyl shoes.
No, they're not the sexiest shoes in the world, but they were in style back when the movie was made. At least the chunky heel was ... not sure clear vinyl ever was in style, but clearly they were needed for the movie.