After everyone yells at Kramer (Michael Richards) for watching the "before footage" on Jerry's (Jerry Seinfeld) VCR, he says, "All right, I'm gonna go take a look at this." and leaves. However, he leaves without removing the tape from the VCR, thus having nothing to "take a look at."
When Jerry and George fight over the tape recorder, they are both holding onto it. In the next shot, only Jerry is holding it.
When Kramer begins to listen to the tape, he crosses his right leg over his left and when they show the wide out shot his legs are uncrossed.
Kramer says, "Oh yeah!" with an awed expression on his face. In the next shot, he is smiling.
When the repairman is talking to Jerry, he is standing/working in the upper part of the refrigerator. The camera pans to Jerry then back to the repairman and now he is working in the lower half of the refrigerator.
Everytime George goes into Jery's bathroom he goes left. The sink and mirror are directly in front of the door.
When Kramer films George and Elaine with his camcorder, the left edge of the street-facing wall of the 'Jerry's apartment' set appears briefly.