BizSugar.com › Marketing › Bringing Your Presentations Into the Widescreen World :: Small Business Marketing Blog from Duct Tape Marketing

Towards the end of 2008, YouTube announced a change to the aspect ratio of the default player for the site. The standard ratio for online video had been 4:3, but the new player standard is now 16:9. Aspect ratio is simply an expression of the relationship of height to width. Something that is 4 to 3 might be 4 inches wide and 3 inches high, and if it is shown on a screen that is 40 inches wide it will be 30 inches high.