Cell phone accepting external video ?

Hi.
Anyone knows how to display a video signal on a cell phone screen in real time ?

Point is to see a surveillance camera with sort of virtual reality goggles, NO internet involved, no video coming trough the air, just wiring-in a composite signal. In other words, using the phone as a monitor.

 

Thanks. Yes, I was evaluating others alike :

----> http://www.ebay.com/itm/Micro-USB-E...300065?hash=item542d105d61:g:feYAAOSw0QFXDSRM

And unsure from the description if I can get real time video into an Android smartphone or the video is recorded by the camera gadget to be played later. Also, a mental fart prevents to interpret the focal distance "from 4cm to infinity" will work for a 4 metres away target. Can anyone help reading between lines ?

There is models with 5mm lenses, 7mm, ... Which would be convenient for not close-up images ? Seems 5mm, 7mm is the lens/camera diameter, not optical specification ¿?

This one pictures like it does distant imaging :
----> http://www.ebay.com/itm/Micro-USB-Endoscope-Waterproof-Inspection-Camera-for-Android-OTG-Smart-Phones/262951063994?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=41376&meid=6142ee42dfcc4d4882e62594484a9ae8&pid=100005&rk=6&rkt=6&sd=361533300065&_trksid=p2047675.c100005.m1851

And the smartphore appears to need OTG 'On-the-go' feature...