Right! Well, it's obvious the guy is a smoker so maybe he's into all new kinds of ways to light up. So maybe he's trying some home made device or using one in a new kind of way. I think he got so caught up in his failure to ignite initially that the actual success took him by surprise and he just panicked. I don't know, still very very dumb. Kids....this...don't do.
-The part where he sits one flaming object down, starting another fire, so he can put out the other fire.
-The part where he picks the fire up and throws it in the corner.
-The part where he attempts to put the fire out by throwing cardboard boxes into it.
-The part where he closes the door behind him when he leaves the burning room to go get water to put the fire out.
-The part where he throws a few ounces of water on a fire as big as him to put it out, and repeats.
-The part where he slips and almost falls on the water he spilled.
-The part where he stops fighting the fire to mute his microphone.
-The part where he stops to remove his coat.
-The part where the camera finally burns up.
-The "AM I SUGOI KAWAII DESU NE ONICHAN KIMOCHI?!?" loli dialog soundtrack playing throughout.
I presume he's often ordering smoking gadgets, gaming mice, and other garbage off the internet (because he never leaves the house), and he never cleans up the packaging (because he's a slovenly gamer shut-in, and he can fill the boxes with more trash).