Slightly better quality:

http://www.veoh.com/videos/v6496877tC...

There is actually a sixth egg as well as the five shown, but I decided to leave it out since not only would it mess up the "five" theme, but it's also very boring. If you climb into the mine cart while on Crater Island, there's a hotspot on one screen (the one facing the slide?) which causes you to silently fall down the slide. I guess this qualifies as a Riven egg because it's only available when the other eggs are unlocked as well, but it's boring and doesn't compare to the others.