This is a chemistry laboratory in an ordinary middle school. What is this?

A large number of videos uploaded to the H2 element laboratory from mile to mile. It means that drugs that are difficult to manufacture or impure in the laboratory can be bought with money. This is a series of videos from chemistry laboratory and H2 element laboratory of Bi Li Bi Li General Middle School. Later, it was broken by netizens as the beginning of the video of ghost animals in chemical experiments. This sentence is often the only original sentence in this kind of video. What are the following? Mixed shear, all kinds of explosions, smashing and the like are in sharp contrast with the beginning.