Alright heres the deal, i have been looking through all the Hydross videos and i have found a couple that are worth watching. I have also found a strat guide that will help alot.

Strategy Guide: http://www.worldofstrats.com/Hydross/tabid/59/Default.aspx

This is a great movie, despite the corny music, from a warlocks PoV:
http://files.filefront.com/Illuminati+vs+Hydrosswmv/;7056516;/fileinfo.html

For all those dirty rogues out there there is another vid fetureing melee dps:
http://files.filefront.com/HydrossSUwmv/;7225199;/fileinfo.html

The final video i reccomend to watch is the "How To: Hydross The Unstable" video. It is very informative and i seggest watcing it:
http://youtube.com/watch?v=zbFIP24vjfE