What was the original source of the video on the tape you are playing in that deck?

In iMovie, when you launch it, a drop down appears... what happens if you select DV Widescreen when you start the new project? Letterbox is 16:9 standard definition video. DV Widescreen is standard definition 16:9 video...

Which MacBook and which G4 desktop? If the MacBook is a CoreDuo machine, it will likely be faster than the G4... ut to be totally sure we need more specs on both machines.

That GV-D300 looks like it is from 1998 (copyright notice on the manual)... not that it should make a difference, but that is a rather old deck to be using these days... why not use a camera instead? I noticed the manual makes no reference to connecting to a computer!