What is 720p?
720p is a video format with a widescreen Aspect Ratio of 16:9 pushing 1,280 pixels in width by 720 pixels in height. The "p" appended to the end stands for Progressive, meaning every 60th of a second all of the pixels on each frame are displayed. With "i" or Interlaced video, the odd pixel lines are drwan, then the even pixel lines are drawn, doubling the percived frame rate without the extra bandwidth usage. 720i is non-existent however and if you have seen it referenced as such, these are often typographical errors or mis-information.
