Here we have amateur footage taken by inmates in a prison. They are gathered around another man who appears to be very nerous and rightfully so as we are about to see. He is pointed at and seemingly ridiculed for something before being made to lay his finger across a bar where it is then swiftly chopped off with a knife. One of the inmates picks it up and dispays it to the camera and it cuts off. Looks like this was probably not the end of his torture, though. No idea where exactly this is from or what the situation is, maybe someone can translate.
Props to @mrspink.