I cannot understand this - whatsoever. What you're going to see will leave you dumbfounded and enraged, too.
A girl is seen boiling water on the stove, preparing for what is called a "hot water challenge." What's unclear, though is if guy seen in this "prank" video is a willing participant or not. Make up your own mind.
However, what is absolutely clear is how stupid this is. This is just a case of negligent parents leaving kids up to do asinine things. The kids, of course, are just as much to blame, too.