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.