Try to figure out the trick in this alternadvertising video for a Samsung phone with a built in "HD" video camera. It gets good around the 0:50 mark. It does look really great in HD. [youtube=http://www.youtube.com/watch?v=iX8iVo5vc8o&fmt=18]
Update: Here's the solution to how they created this tricky video.
[youtube=http://www.youtube.com/watch?v=rTG58zlBlE8&fmt=18]