Hi Dieter,
I can't resist an astronomy video, of course. There was a coordinated international outreach campaign in 2009 and they produced this as an introduction:
http://www.youtube.com/watch?v=WVJmZmo6kzIHigher resolutions are available, but I couldn't find one on YouTube.
However, many outstanding astronomy videos include computer-generated graphics or enhanced colour processing, which I think disqualifies them as WOW experiences.
I honestly prefer the Earth-bound scenery videos, which I often see on HD shows like "Aerial America," "Canada: Coast to Coast," or "Magnifico Italia." But, with Michael, I don't much like some of the video editting techniques that they use these days. They give me a headache. Hard cuts after an image is shown for a fraction of a second might be fine for music videos, but I don't think it helps enjoyment of landscapes.