Exactly, there's something about the way Seth voices these characters nowadays that just makes even the simplest of dialog funny. The little things Peter was saying during this cutaway weren't necessarily funny by themselves but Seth has a way of making it hysterical. But this was funnier when I first heard it unbleeped yesterday morning. The bleeped cursing in the actual episode ruined the flow.
And I don't see what the big problem was with Stewie's video. I look at the show these days as a half hour sketch comedy with a simple plot to carry it along. So I don't see anything wrong with a three-minute music video, especially when the visual imagery was so hilarious. Again, they've fine-tuned the character designs to such an extent that (IMHO) when they do something like this it's funny just to see Stewie in all those cliched music video enviornments. I laughed harder at that than I did at anything else that aired last night, or anything else I've seen in a long time.