What does the number part of my video’s resolution actually mean?

Generally resolution in Videos you see—360p, 480p, 720p, or 1080p—represent the number of horizontal lines a video has from top to bottom. So, a 480p video is made up of 480 lines stacked one on top of another, with each line being 852 pixels wide. In other words, a 480p video has a resolution of 852×480 pixels.

For comparison, a 720p HD video has 720 lines that are each 1,280 pixels wide, meaning that it is more than twice as sharp as a the same video at 480p and can be viewed on a much larger screen.

Resolution name Horizontal x Vertical pixels Other names Devices
8K 7,680x4,320 none Concept TVs
"Cinema" 4K 4,096x[unspecified] 4K rojectors
UHD 3,840x2,160 4K, Ultra HD, Ultra-High Definition TVs
2K 2,048x[unspecified] none Projectors
WUXGA 1,920x1,200 Widescreen Ultra Extended Graphics Array Monitors, projectors
1080p 1,920x1,080 Full HD, FHD, HD, High Definition TVs, monitors
720p 1,280x720 HD, High Definition TVs