Hello everybody.
I am the owner of the half destroyed MT2 in the video. Thanks for all positive comments about the vid and my homemade rollbar :-)
As jadda said it comes from a sun-chair. As you can see on the pictures it doesnt fit perfectly with the screw holes but it was a first try and I have no plans on fixing it until i breaks. When I does I will have to buy lots of new parts :-( Not many screws work anymore..