When i put my key in the ignition and take it out engine on and off i get this weird beeping noise, i have linked a video which represents the exact noise i am obtaining. No lights on my dashboard and all doors and windows are closed. If anyone could help be really appreciated 

 

Could be that there is a telematics box or aftermarket bluetooth module fitted somewhere that has had parts removed to decommission them but not enough to totally disable thus causing these units to give an error tone.
Definitely not a standard Ford thing.
In my prevoous Focus I had a Parrot bluetooth system that had an intermittent fault with the connected controller / screen which produced warning pips.
A new screen solved the problem and no more noises.

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An optional extra somewhere for some reason alarming. You need to have a good butchers under the dash see what you got