This is similar to a bump key (that can be used for houses especially) except that quite a few modern cars have a immobiliser chip inside the original key making the above only useful for older cars such as the Vauxhall/Opel in the video, you'd possibly be able to get in but starting the car would be a no go.

still you cant start the car , the chip in the key is missing.

This is the one used in GTA series!

http://www.eurocarnews.com/media/pictorials/2123/12542.jpg
Where is your god now?