IMAGINE this comment gets pinned

The idea of botw link unknowingly using a mask that still straight up still has a vengeful spirit in it is very chilling, but also very funny because majora cant do anything bc hes stuck in hyrule.

Majora's Mask helped me move on from my mom's death. I understood the pain and anger of the Imp and of the characters Link was helping. It will always hold my heart.

The theory that Majoras powers only activate in Termina is so genius

Majora’s Mask feels like a fever dream. The golden cartridge was such a cool idea too.

I like to believe the Mask is under the great sea in the Adult timeline.

The fact that in BOTW the masks eyes are still glowing (whereas in A Link Between Worlds the eyes are dull and it appears to be incapacitated or at least inactive ) is frightening. And it can even display it's manipulative properties on the monsters said to be under the control of calamity ganon. Could this mean that in BOTW, not only is Majora still active inside the mask but that it's now powerful enough to snatch away control over monsters from calamity ganon itself ? That is horrifying to think about... pray to the golden deities that that thing never gets back to Termina.

You forgot one of the most subtle things of all, the mask itself.  Look at it, what do you see?
It is a heart shape, with spikes protruding from it.  It is a heart in pain, essentially a foil for regret and sorrow.  
The authors wrote Skull Kid, who regretting his friends the giants leaving him behind, and Skull Kid wears this mask of a heart with spikes protruding from it.
Why?  Because Skull Kid is a foil for Link, who regrets his friend Navi leaving him behind.  

In the end Skull Kid is briefly reunited with his friends, the giants, but tell him they must go but it is ok, live life to your well despite the parting.
Happy Mask Salesman himself hammers this point home "Wherever a meeting is to occur, a parting must sure follow".
This is the big lesson for Link, who does not want to part with Navi and chases/searches for her.  

The game is all about learning to say goodbye, either from people drifting apart or people dying.

Some would say that the theme of saying goodbye is all about learning to grow up, and there is another subtle jab about this.  
You are Tingle.
Rather, you are Link and Tingle is the Termina version of Link, and therefore Tingle is a reflection of Link and therefore the player.
Although his function in the game is to sell maps to the player, his story is essentially "I want to dress up as a green fairy boy (Link) and go on adventures".  Guess what the player does every time he turns on his Nintendo console and plays a Zelda game?  The player becomes the green fairy boy Link and goes on adventures.  This jab is further dug in with Tingle admitting he's 35 and his father is embarrassed by him doing those silly things in his outfit.  Of course Tingle is a character played for laughs, so him being a funny age is part of his character, but it runs with the theme of "grow up" that the game tries to tell.

I keep forgetting that most zelda theorists don't have the millions of followers they deserve

13:37
"If it wasn't in the boss fight I would say it doesn't really look all that malicious"
He says as Majora is moon walking



WAIT, MOON WALKING

Imagine if Ganondorf got a hold of this mask and won in his timeline. I’d definitely play that game.

We’ve met with a wonderful fate

I am literally dying for a chance to go back to Termina. I love Zelda games that have villains other than Gannon. It makes for both a refreshing change and opens a lot of avenues to explore Link without the foil of Zelda.

At the end of the video, it could be possible the Majora's Wrath may already be gone. If was shown and displayed as a historical artifact then it may have already received the attention it desired.

It would be cool if there was a spin-off game or future dlc that let you play as the mask salesmen and let you discover how he came to posses the mask.

Majora not being inherently evil is the only explanation I've believed for why the boss fight played out the way it did: a mask, then an incarnation, then wrath. Majoras Incarnation implies this is what it would be like if it had a body, playful and silly. And then beyond that in the way that the incarnation is beyond the mask alone is that same silly being's anger. It only really adds up if Majora is naturally goofy but has internalsed a wrathful need for vengeance and that's WHY it's doing all this. That it's not a random need for destruction that's causing it to have this goal
So yeah, I'm convinced

7:40
To answer your question, you don't really need a theory. Termina is an alternate dimension and Nintendo had confirmed this. Plus by playing the game, it makes otherwise zero-sense how getting lost in the woods will find you popping out of the bottom of a clocktower in the center of a town.

It's also possible that Majora is still inside the mask at the end of Majora's Mask. After all, the text says "so the evil has left the mask after all..." The evil, not Majora itself. I think it's more likely that Majora was somehow appeased. After all, Link played its game, ending Majora's neglect. So, perhaps the Majora in BotW is willing to help the reincarnation of the child that appeased it by protecting Link from monsters? Especially since Link went out of his way to dig Majora up again? That's my headcanon, at least XD

18:08 Correction: “Hylia help us all”

Majora’s Mask fools all four main monster types.