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No, I have not read the comments, as I downloaded the song with this inserted cartoon video --- using KEEP VIDs FROM YOUTUBE, etc --- and I've been watching it repeatedly, on auto mode, without an active site...
Anyway, I don't see the cartoon as you said it here.
I see it as LOVE AND LOSS... which is ultimately what the SONG here is really about...
And it's a bit odd that I am so drawn into it, consider I've never loved anyone, much less lost anyone... So I guess some of the thoughts, yearning, and dreams we have must be deeply, intrinsically rooted, NOT created by actual human events and acts...
The original, short cartoon video seems to be two respective young, melancholic people.... the young man being dead, surrounded with skeletal puppies and the young woman, out aimlessly wandering thinking about love and loss...
Their lives --- from different realms ---- briefly intersected when their respective puppies went sniffing around, leading both to this place in the woods.
On the young lady's realm, you see fresh flowers blanking the woodland...
On the young dead man's realm, you see cold, snow, and frost all around... when their paths allowed them to finally meet, with him gently touching her, you see his cold hand transferring his other-worldly-frost/energy to her hand, with her impulsively yanking her hand away...
Indeed, as his dead, skeletal puppies marched right up to her, on the little mound, you see the advancing of ice and cold and death.
The boy, of course, doesn't know he is dead.
And that angle --- of the boy not knowing he is dead, of death, of another world not belong in her world here --- reminds me of one movie I've see all these years that deals with GHOSTS being scared of the living (which appear to them as apparition from another world!, lots of ironies), incredibly well made, very intelligently written and moving.... starring Australian actress Nicole Kidman, THE OTHERS...