The video covers thirteen planes of existence in all. These planes of existence aren't all equal - some are huge and important, while others are small and seemingly inconsequential. Some of these dimensions are contained within others, and many were even created by denizens of other realms. It's an interesting list, which we summarize below.
Planes of Existence with PlatinumWoW – World of Warcraft Lore Video
The official Warcraft YouTube channel posted a video with PlatinumWoW, all about planes of existence in the Warcraft universe.
