I second this... you wont notice any difference until you get above 50"... even though there is debate which is better as one is progressive and one interlaced. Some believe 720 p is better because of motion blur.
Motion blur is only an issue on low end LCD's and older LCD/DLP's. Quality modern sets do not have this issue.
That guy in the video contradicted himself towards the end. First he claims 1080i is only 540p. Later in the video he says 1080i60 is really only 1080p30. Tsk... tsk... tsk... He must have made that video for people with older Vizio, Sceptre and Westinghouse sets.