There is a problem with Internet Explorer 8 (IE8) that prevents some people from viewing the videos. The solution is to go into Tools and "Compatibility View Settings" in Internet Explorer and to add familytreedna.com to the list.
It is likely that someone has changed the view setting for the Internet Explorer (IE) browser. You can reset the browser view setting by holding down the control key (CTRL) and pressing the zero (0) key.