How to hack video screens on times square

The Caption on the video reads:

The way it works is pretty simple: plug in my transmitter into the iphone 4 and play back any video clip. you can play it through the ipod feature or through the camera roll. the transmitter instantly sends the video signal to the video repeater and the video repeater overrides any video screen that it's being held next to. it doesn't matter what shape or size the hacked screen is because the hack video will simply keep its correct dimensions and the rest of the hacked space will stay black.
i chose times square for my demo because it has lots of video screens to try it on. it is also one of the most monitored and secured areas in new york city and that made it that much more fun :). you can see in my video that the repeater is pretty powerful but the signal is not very stable yet. i'm working on that. i will post a new video later this week explaining how i made this prototype.

I am sure this is a fake which had me going for a few seconds. I suppose if you pushed a strong enough signal to override a tuner or inject something in to an IF stage.  So maybe on one brand of TV something like this might be possible But on the 4 screen system too!?!?  

Most of these advertising displays are running off PC's with hard drives, or little embedded processors and flash, at most they are getting video off a Satellite or Ethernet to the Internet.

Following the link in the video takes you to the same video that has a trailer for the movie limitless after it.

Second time I almost fell for a lie. Yesterday it was 47 year old television signals bouncing back to Earth
I guess it's all good fun.

47 year old television signals bouncing back to Earth

UPDATE: I haven't been able to confirm this story.   So Till it's confirmed all I know is what was in the link below apparently dated:  Wednesday, 1 April 2009 UK    Humm, that's not a good sign.   Well there is another story where apparently other Lost Doctor Who episodes that are being found.  The interesting thing is that this is almost possible, when I started to think about the inverse square law over 50 light years it would be hard to receive but possible on a straight path.  But now add a  reflection of that signal, it would have to be a massive corner cube reflector or massive focused parabola for a strong enough signal to arrive back. Still maybe some day we will make a strong enough receiver or make an FTL drive and just get ahead of the signals.  

From BBC:

47 year old television signals bouncing back to Earth

Arecibo Observatory in Puerto Rico finds television shows lost in space.

While searching deep space for extra-terrestrial signals, scientists at the Arecibo Observatory in Puerto Rico have stumbled across signals broadcast from Earth nearly half a century ago.

Radio astronomer Dr. Venn described how he made the historic discovery after analyzing a number of signals originating from the same point in space. "I realized the signal was in the VHF Band and slap bang in the middle of 41-68 MHz. It was obviously old terrestrial television broadcasts, but they seemed to be originating from deep space." After boosting and digital enhancement the resulting video signals are remarkably clear.

Responding to questions, Dr Venn was at pains to explain that little green men are not showing repeats of old Earth shows. "They are signals that left the Earth about 50 years ago and have bounced off an object or more likely a field of objects some 25 light years away". Radio signals travel at approximately 300,000 kilometers per second. The distance the vintage signals have traveled in the intervening years is vast and whatever they are bouncing off is too far away to see with even the most advanced optical telescopes. "...we asked NASA if they could point Hubble at the centre of what we've named the 'Bounce Anomaly'. NASA were very keen to help once they had seen our data." However the $3 billion space telescope was unable to produce any clues as to what the signals are bouncing off. One theory is a massive cloud of asteroids is acting like a mirror in space reflecting radio signals from our past, back to us.

A BBC team have been working closely with Dr Venn's team to help recover the signals. BBC Television historian Peter Wells, explained "We now know these are original broadcasts. So far we have recovered about 7 weeks of old television signals from space. Every day in our lab is like traveling back in time. And speaking of which we have just started the digital recovery of signals that contain lost Doctor Who episodes.

Lost Doctor Who episodes recovered from space.

The BBC will be archiving all the recordings recovered from space and there are plans to broadcast some of the highlights later in the year.