The one I purchased has a 5-pin DIN connector labeled
"RF Modulator
Only" which gives me hope that the video interface is nothing too crazy
I cna think of no sane reason to use an RF modulator with anything other
than a TV-rate video signal. And depending on coutry of origin, the
signal will either nbe 525 line RS170 or 625 lin system B/G/I (all much
the smae for this purpose). Neither are hard to find something to
display them.
I would guess the DIN socket carries ground, composite video and a power
supply line (12V?). I shouldn't be hard to trace them
-tony