Lossless compression reduces video size without reducing quality by?

Lossless compression techniques are designed to reduce the size of video files while maintaining the original quality, meaning that no information is lost in the process. Removing unnecessary metadata is considered a form of lossless compression because metadata includes additional information about the video, such as titles, descriptions, codec information, and other non-visual content that does not contribute to the actual visual representation of the video. By eliminating this extraneous data, the overall size of the video file is reduced without impacting the visual quality of the footage itself.

Other methods typically associated with reducing video size, such as lowering the frame rate or reducing color depth, actually alter the way the video appears, which can compromise the original quality. Cropping unnecessary footage also physically removes parts of the video, resulting in a loss of content. Therefore, the correct answer lies in the fact that removing unnecessary metadata helps achieve compression without quality loss.