Yup, it has to do with the weather. Again, I'm not sure which one (the voice-over saying that it's storming, and we see a Collinwood bathed in glorious sunlight, or that it's a nice day out there, and we see the typical fog-shrouded house), because I haven't watched the video in awhile. But when you realize the blooper, it is funny, almost like an SNL skit. Somebody in the crew obviously slipped the wrong slide in.
Gerard