Question: what is the difference in video quality?
Answer: The resolutions you see—360p, 480p, 720p, or 1080p—represent the number of horizontal lines a video has from top to bottom. ... 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.