You've heard this a million times by now, I'm sure, but it deserves saying again: this is magnificent.
It's just the perfect blend of storytelling, art and music, so brilliantly combined that it packs an emotional wallop every time I watch it. (And yes, like everybody else, I can't help watching it again and again!) The story is so moving and the emotion is genuine: the love, the grief, the worry and regret and longing. I adore older Snape and Harry, and the way you realized the kids--excellent on all counts. Little Al and James are so clearly like their fathers, yet they're their own characters as well. (I admit that I'm especially entranced by Al, who's so much like her Dad, sort of suggesting the way Snape might/could have been had he been raised by a parent as loving as he's proved to be.)
The simple but expressive style and the use of black and white draw attention to the characters, the story and the emotions, and I'm sure that I could watch this all day and still not have listed all the excellent, thoughtful details that made me gasp--but instead of blathering on, I'll just say that I loved this to bits and can't wait to show it to as many people as possible.
BTW, I'm flying the Crack Broom for Snarry next month--do you mind if I use this as one of my art recs? It's so excellent that I'd really like to see it shared with as wide an audience as possible.