In and around 2007 Youtube users had been making World of Warcraft song parodys based off the popular MMORPG by blizzard entertainment a game played by over 11 million people

one of the most Popular known names of that time was "Nyhm" Creator of hard like heroic and many others

Blizzard Themselves also Released a Musical Warcraft Icon often performing at blizzcon
https://en.wikipedia.org/wiki/Level_70_Elite_Tauren_Chieftain

Following Nyhm was a popup of many "WoW song artists" Including the Druidboyz, GiGi and Decision

Those People along with a Machinimator formed a "group" by the name of Azerothian 6

and made a 1 hit song Honor Killz a parody of Purple Pills

this group quickly fell apart however because of competition

That is when a MAJOR spring up of "small acts started popping up"

Such as Sharm, Valek, Crykoda, Bonez, h.o.y.t., PVP sienah and many others started popping up

Some of them attempted to form another "group" now named Azeroth United

These "WoW Rappers" Often held Open Collaberations and Contests where people would make video responses to fill in the blank verse

(Example)

(Example Response)

People would also get into "Heated" Battles usually Alliance vs Horde which are the two in game factions

To this day there are many many many WoW Rap youtube pages ive posted lots of youtube songs and free style from DIFFERENT youtube users

youtube variety:

There are many more users out there that are involved in the World of Rapcraft some better than others but so many people are involved I did not want to put 1,000 youtube videos here