Here are quite a few things I noticed, having watched the whole thing a few months after the wedding (I fortified myslef with a healthy dose of cartoons and comedy movies.
*The smirk on Kate's face when she was listening to the Vicar recite "for richer or poorer"
*Each time Kate looked at Harry, he smiled, but the rest of the time, he looked like he was about to cry; he lowered his face a couple times and swallowed hard, looking at the ceiling almost in supplication
*At the time when they were supposed to confess any reasons that they should not be married, I had the thought that there is something, something that is going ot come out at some point
*Each time Kate began to smile smugly, she suppressed it immediately in her eagerness to seem virtuous and demure; when she was standing waiting for the march to begin, she kept almost smiling widely, and then suppressing it
*Her idiot brother recited the virtues and important things for a Christian to not do, all of which Kate is guilty as sin of ironically
*How Kate kept looking at the cameras and even rolled her eyes at one point during the vows
*When sitting back down, her brother took the program (this was after the signing of the register I think) and put it under his butt to sit on, instead of keeping it in his hands
*Princess Anne looking really, really contemplative when she was talking to her husband
*Zara sneaking a bit of gum into her mouth while sitting with Mike
*When Kate got to the altar, Prince Andrew looked as if he were seeing some dream dashed
*William repeated the vows quickly, as if he were trying not to laugh or cry; he smiled a little at Kate, but it was more as if he were trying not to blow up at her at the altar; I I think he was on the verge of crying
*Her brother looked like a pompous ass of a man and tacky in his suit; he looked like he was going to prom
*When walking down the aisle, Kate was center while her father was off to the side, like a good little doormat
*When the Vicar asked "Who giveth away this woman?" Michael didn't respond "I do" as he should have; it makes me wonder if Carole ripped out his voicebox
*Camilla looked like she was in a huge amount of emotional pain herself and as if she and Charles were doing the dirty work on behalf of HM when they went to witness the signing of the marriage license
*The princesses looked like they were there under duress and I am frankly glad that they didn't wear anything too conventional
*The faces in the audience weren't happy ones, there were a lot there that looked concerned, as if wondering where someone was; there was no uniform goodwill and no real interest in 'the moment' as if they were there, stuffed into suits and dresses, and shipped in to sing the songs and suchlike
*There was little to know sense of community and anticipation; the press fawned over how William drove his own car, but it's not like it was the same as if he were in a carriage or anything really regal
*Westminster looked rather desecrated from the appearance of all the greenery and the trees/flowering actually created a chintzy contrast to the ornate stateliness of the chapel; if the greenery had been in a side chapel, then it would have likely been better, but contrasted with the gold and blues and the grey stone, it looked chintzy
*During the song "God Save The Queen" HM stood silently as if a dream had just dissolved before her eyes; I am sure that she couldn't really sing along, but she looked like she was at a particularly unpleasant engagement
*The whole RF looked like they were at an unpleasant engagement that they either had hoped to cancel or preferably get over with as soon as possible
*When the press were talking about his colleagues in the SAR, I kind of smirked when they were speculating about continuing to work since knowing what I know now, it ain't gonna happen
*At a few moments during the ceremony, HM didn't even sing with the congregation, but instead just looked down with her hat hiding her face; not good, not good at all since that is usually the royal way of hiding tears
*I noticed that after Kate looked at Harry playfully a few times and squirmed giddily, William said something and she suddenly stopped looking at Harry and looked straight ahead, finally getting it together; she was acting like the three had been buddies since forever and that this was some final culmination of their childhood chumminess
*William looked like he was bursting to say something or yell/cry/announce his refusal, but was keeping it in
*No one in the RF looked unanimously happy
*When Kate passed, there were no bows, or nods, anything and some gave her a direct cut by looking away from her as much as possible. As if they couldn't stand looking at her at all.
*Carole looked happy walking next to Charles, but even then Charles was avoiding her direction.
*a few wealthy Arabs there who looked quite solemn and yes, all of them seemed to look at William curiously, as if wondering if he would really do this, if he was really there doing this, and if the wedding ceremony might not actually be postponed.
*James actually put his wedding program UNDER HIS BUTT and sat on it as if he couldn't hold it in his hands
*Carole was watching Pippa and Harry, as if planning thier wedding already
*The kiss on the balcony was not as gripping and Diana and Charles' was; the shouts weren't as in unison as with Charles and Diana
*A few seconds before she started walking down the aisle, Kate had a brief look of grim determination, as if she were running a mile and was within sight of the last sprint.