It consumes a lot of server resources, and its online viewing is possible only with a fast network connection. High definition video is not well suited for distribution on the web. For example, a 4K video is 3840 x 2160 pixels (or shortened to 3840x2160). Generally, the higher the video resolution, the better the image quality. One of the main characteristics of any video file is the frame size (resolution), that is, the number of horizontal and vertical points from which the picture is formed in it.
What is video resizing and why you might need it