Brody's camera is a Video/Hi8 camcorder. However, after Kramer and Jerry witness Elaine's footage of herself doing the "little kick" dance, Kramer ejects and hands Brody a VHS tape (or a VHS-C tape in an adapter), neither of which would even fit into a Video/Hi8 camcorder. In other words, the tape that Kramer gives Brody that Elaine filmed herself on couldn't have been recorded with the camcorder that they used.
When Brody says he's coming up, the door is closed. Then, when Jerry and Kramer are panicking to watch the tape, the door behind them is inexplicably slightly ajar. But when Brody arrives, the door is closed and he has to open it to get in.
During the office party scene, George is holding a quesadilla that changes orientation between shots.
Everyone talks about how the filming of the Death Blow pirate is such a great job, but all that talking and moving the camera around would have ruined the movie.
Brody was bragging about Jerry zooming in, but if you zoom in while filming a movie, you're going to cut out parts of the picture.
Right at the beginning of the episode, Jerry and Kramer are walking in front of a row of stores. About 15-16 seconds in, you can see the reflection of the cameraman in the store windows.
The taxi cab that Elaine gets into after confronting George about Anna has "NYC Cab" on the door, but California license plates on the bumper.
All of the talking would be heard in the bootleg film, ruining it.
George mentions that he has his father's '68 Pontiac GTO. When we see the car, it is actually a '67.
When Elaine (Julia Louis-Dreyfus) mentions the "Big Peterman Bash" she's going to throw, George (Jason Alexander) asks, "Food? BAR? George?" In episode 1.11 however, it was revealed that George doesn't drink alcohol.
Jerry (Jerry Seinfeld) tells Elaine (Julia Louis-Dreyfus) that he has something to put in the laundry, but in many other episodes during the series, he sends his laundry out.