You're missing loads. For a start you're missing the strong emotional core to it that makes it such an appealing tale. Spider-Man 2 is a story of a hero's growth, and the burden of being that hero. After 2 years of being Spider-Man it's taken this negative toll on Peter's life in just about every area. He's got a strained friendship with Harry, he keeps missing MJ's plays and thus is isolating himself from her life, he can't hold down a job, he is failing college, and he can't help Aunt May with her financial troubles.
Finally Peter reaches a breaking point where it's affecting him so badly it's making his powers fail. Like when someone is so psychologically stressed it makes them ill. He can take it no more, and after a powerful confrontation with Uncle Ben in his mind, he throws in the towel. It's the very essence of the conflicted character that is Peter Parker and his emotional turmoil with dealing with his superhero life;
Tobey Maguire was a power house in this one. Able to depict all the conflict, drama, and emotional turmoil that makes Spider-Man such a compelling character. There's so many great scenes he got to sink his teeth into. From confessing to Aunt May about his part in Uncle Ben's death, to re-enacting the famous Spider-Man no more scene. All the great character scenes he got to do. From the big ones like confronting Harry after being unmasked by him, to the more somber ones like his "web chat" with MJ after he's saved her from Ock's sinking lair.
Then we have the villain, Doc Ock, superbly played by Alfred Molina. Apart from being a visually magnificent villain, menacing, and ruthlessly brilliant, he also presents a brilliant parallel with Peter and his conflict in the movie. Peter is being irresponsible by giving up being Spider-Man so he can lead his dream of a normal life. Ock is being irresponsible by doing evil things to make his fusion dream succeed. By the end they both come full circle and accept responsibility. There's great chemistry between Maguire and Molina as two sides of the same coin being mirror images of each other.
Molina brings all the menace and nuance to the character. In one scene he's bonding with Peter over the mechanics of Fusion, and then in another he's threatening to peel the flesh off MJ's bones. He gets all the little Doc Ock-isms down to a tee. From lighting cigars with his tentacles, to flashing menacing little smiles when he's about to do something wicked like abduct MJ or smash a bunch of do-gooding citizens out of his way, to the dry villainous humor ("Butterfingers"). By far the best villain of the Spider-Man movies.
The supporting cast is top notch, and all serve as vital cogs in Peter's journey.
Aunt May is at her best in this one. The scene where she gives Peter the $20 on his birthday and then breaks down crying about how much she misses Ben is so powerful. Gives me goosebumps every time. She's not shown as helpless old lady. In spite of her being taken hostage by Doc Ock, she ends up helping saving Spidey's life when she smacks Ock in the face with her umbrella just when he's about to stab Spider-Man with his tentacle blade.
She's shown as an emotionally strong and capable woman. She doesn't fold up like a lawn chair when she loses her home. She has arranged an apartment for herself, and has her house all packed up and ready to move. Of course we have the big one, where Peter tells her the terrible secret he's been holding on his conscience for 2 years; his part in Uncle Ben's death. But May still forgives him, commends him for his honesty, and tells him how much she loves him. This is the perfect depiction of the Peter/Aunt May relationship.
Franco is on fire as Harry in this. From the get-go you can see him trying to live up to his father's legacy, still trying to impress him even in death. "Octavius is going to put Oscorp on the map like my father never dreamed". Harry's downward spiral in the movie is exceptionally well handled. Watching him go from cocky businessman with delusions of grandeur, to broken drunken failure, to angry bitter friend who publicly slaps and verbally humiliates Peter in public, to making a dangerous deal with Doc Ock to get Spider-Man, to finally losing his last grip on sanity and hallucinating his father telling him to kill Peter and then finding the Goblin lair. It was the perfect handling of Harry's journey into becoming the Goblin.
Mary Jane is shown to have grown a lot since Spider-Man 1. She's reached her dream of being a successful actress on Broadway. She's independent. She's a star. But she has not forgotten her friends and family. Where she came from. The rift between her and Peter is well done, as she clearly yearns for him to be there for her, see her Broadway play she worked so hard to get to. Like Aunt May, MJ has a bit of spunk and toughness to her, and doesn't just come across as the helpless damsel. She gives Ock verbal guff, and even tries to smack him with a plank of wood when he's got Spidey captured. The only flaw to her character was her seeing John and trying to get with Peter at the same time. If John was not the one she really wanted then she should have ended it sooner. I understand the point of it was MJ was settling for the safe choice, rather than the one she really wanted. But it's not fair on John to be used like that. But in spite of that, when she finally chose the right guy, I think we all still cheered at the end when we got "Go get 'em tiger".
Jonah Jameson....what can be said about him that has not been said before. J.K. Simmons is PERFECT in the role. And he has his biggest role yet in this one. He's a side splitting scene stealer, and even gets to venture out of the Bugle offices a couple of times during the course of the movie. Watching the TASM movies, seeing Jameson's absence in them, it makes you realize just how much life the character of Jonah brings to a Spidey story.
I mean I think if you've seen the movie then it's kind of self explanatory why Spider-Man 2 is so great, because I really believe the movie's brilliance speaks for itself. And I haven't even mentioned the mind blowing action scenes that look like a comic book come to life. In fact I'd say still the best action scenes of any CBM. No wonder Spider-Man 2 won an Oscar for the special fx.
So I hope that gives you some idea of why people see it as the best.
No, just pity you because your video doesn't work