What does reducing bit depth in video files do?

Reducing bit depth in video files allows for larger reductions in file size because bit depth refers to the number of bits used to represent the color of each pixel in a video. A higher bit depth means more information about color can be stored, which leads to larger file sizes. When the bit depth is decreased, fewer bits are used for each pixel, resulting in a smaller overall file size.

This reduction can lead to a loss in color detail and gradation, but the primary benefit is the significant decrease in the amount of data that needs to be stored or transmitted. Options that state there is no impact on file size, increase the resolution, or enhance color accuracy do not capture the fundamental effect of reducing bit depth, which primarily centers around the reduction of data and file size.