On October 6, 2009 I built this external circuit to bring the video, ground and +5v out to a separate PCB with an RCA jack. Eventually I'll add an LED and I should have included a diode to protect the Apple 1 from any surges coming from the video terminal. It's on my list.
In any case, I did not see anything on the video monitor other than a gray screen. I don't have a keyboard set up yet, with reset and clear, but I was thinking I might at least see random characters.