Are you planning to watch the sequel next, or are you more interested in the behind-the-scenes "making of" this extended version?
In the standard version, the conflict can feel like a simple "good vs. evil" battle. The extended cut adds "useful" layers that make the motivations of both sides clearer: Avatar.2009.EXTENDED.480p.BluRay.HQ.x265.10bit....
The (which your file likely contains) adds about 16 minutes of footage that changes how you view the world of Pandora. What makes the "Extended" story more useful? Are you planning to watch the sequel next,
The movie begins on a dying, overpopulated Earth, showing Jake Sully’s life in a cramped, dark apartment. This gives you much-needed context on why humanity is so desperate for the resources on Pandora. The extended cut adds "useful" layers that make
The ending includes a more powerful confrontation between Jake and Colonel Quaritch, making the "savior" arc feel more earned. Technical Quick-Note