check out the amazing differences in video quality between the various video sites. As expected, youtube looks like crap (someone commented on my last youtube video to day, just to say it was terrible - I knew that). The MSN video quality looks fantastic. Hopefully it'll all be that good one day and we can nick the content and put it on DVD (which will probably be considered very passé and lo-tech by then when everyone has HDTV and Blu-ray discs)
Also, have you ever wondered what things would look like if you could travel at the speed of light? (I have). Well this might help answer the question