Update 'README.md'

README.md

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 # Hencoop scetch for Arduino using automatic light and door
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-[![Hencoop video](https://img.youtube.com/vi/Ukj6PNlihPA/0.jpg)](https://www.youtube.com/watch?v=Ukj6PNlihPA)
+https://www.youtube.com/watch?v=Ukj6PNlihPA
 
 ![Hencoop](https://dev.ussr.win/microcontrollers/hencoop/raw/branch/master/hencoop_bb.jpg)