This is a Movie Projector icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,800 icons, all in the same style and quality.
This logo indicates a movie projector from the side. The center is a large square as a base, with two legs holding it up. At the front of the square is the lens in which the movie projects through, and the top of the square is two circles that the film runs through and feeds into the machine.