Comparison DVD vs HD

I'm looking for a HD video clip which is a scene from the movie, but is split and on the left side there is a HD quality and on the right side is an ordinary DVD quality.

I saw this some time ago running on some monitors in a computer shop. It was quite nice to see the difference.

Could anyone please tell me where I could find such a demonstration video?

Thanks a lot!

I would be interested in this too if any were available...