This isn't a relevant video to classic, wrath, retail or hardcore but Its one of my favorites from years ago.

Ascension is a classless private server where you can select from all of the Wotlk talents in a limited fashion. The pace of combat is fast, imbalanced and fun as hell.

This video is half tutorial and half pvp video to my original elemental shaman build. This early into the private server everyone had a unique build as we were all trying to make sense of what was in front of us.