Quote from JeffI didn't say I wanted an explanation of the plot, I was asking Raptor to actually write his thoughts about what the video did right, as that's specifically what I'm curious about. "What a video did right" can touch on more than just the plot. Did he find the animation appealing? Was it the editing? The song? The characters? I don't ever read comments on YouTube so not only did I not bother to look, but the comment you're referencing doesn't touch on any of that. Not only that but the comment is also just a theory, and doesn't really change my opinion that it's a confusing plot, since it doesn't answer things like why were they even at that house in the first place, or how the pink haired character ended up there.
Well what I'm going to say is completely subjective and I want to clarify that. I also want to clarify that I'm not speaking for the fandom, I wasn't even really aware that there was one.
First, pointing out the obvious, I really like the head-bobbing and the vibrant art style. It isn't an amazing animation, but both elements keep the animation moving and alive.
Right off the bat, you can immediately draw the parallel between the characters and Scooby-doo. This gives us a general idea of what their personalities are like (and further progression through the video helps clarify it). I like the decision because sometimes it's difficult to distinguish and/or develop characters within a four minute video without words.
I also liked the transitions between each scene, they seemed to flow together really well. For example, when the video transitions between the living room to the portrait hallway, the author used the suit of armor to make them stumble in front of the portraits and become surrounded. The armor itself contributes to the characterization of the mansion, and the dog's missing head is a similar ruse done in Scooby-doo esque shows, drawing another parallel. The talking portraits, like the armor, give a vibrant yet typically spooky characterization of a haunted mansion.
The falling scene is placed well in the lull moments where there's no beat in the background. You have the somewhat obvious symbolism in the mirrors which become elucidated in meaning once you watch it a second time.
There are also sort of subtle animation techniques that I really liked. For example, when the pink-haired guys' hair is revealed, instead of it just appearing, he swerves his head from left to right, flowing the hair in that direction. I think it's minor, but neat.
Of course, then you have the flashback scene that I think was told well as long as you look at it closely. But un-convoluting the plot isn't the point of this, so I won't talk about it.
I also really like how they presented the heart scene as it rose up and represent how it affected each character. I think it was clever way of transitioning between past and present.
And then there's the whole symbolism of the heart thing, which I also think was conveyed fairly well at the end. Reaching towards the girl, falling towards the ground, etc.
There's a bit more that I like, but I just really appreciate how it was able to tell a story that (imo) is relatively simple but can be looked at for further analysis. Alongside that, it made stylistic choices that made the animation in general more appealing and catchy. Maybe I'm over appreciating and it just resonates with me more than other animations I've seen, but I like what this one had to offer.