Okay, I swear this is going to be the only other comment I make about this video, but I feel it's worth mentioning here because I know that the creator of the video will just delete my comment:

At 7:22:

Humor me for a minute. How many filler episodes does The Last Airbender have?

By my count, there are at least 14. I don't understand how anyone could possible say that The Tales of Ba Sing Se is the only filler episode. Like... fucking what was advanced in Bato of the Water Tribe? What purpose did the Great Divide serve?

My count includes Imprisoned, Jet, The Great Divide, The Blue Spirit, The Fortuneteller, Bato of the Water Tribe, The Avatar State, The Cave of Two Lovers, The Swamp, Avatar Day, The Tales of Ba Sing Se, The Headband, The Painted Lady, Nightmares and Daydreams, and The Ember Island Players.

That's not to say I disliked these episodes - The Tales of Ba Sing Se is one of my favorite episodes of ANY show, Nightmares and Daydreams was my favorite episode when I was younger, and the Headband and the Cave of Two Lovers spawned some of the funniest Avatar related memes - but there isn't anything really happening in there. If you skip those episodes, you don't actually lose anything related to the overall plot.