This video is about making nitrocellulose or gun cotton or flash paper. Celluloid is the first man made plastic and that is made out of nitrocellulose with camphor.
Nitrocellulose is commonly known as gun cotton or flash cotton or flash paper. It is widely used by magicians to distract the audience with bright flame to do tricks. It is used to make modern smokeless gun powder and sometimes as rocket propellant and explosive.
It is easy to make nitrocellulose if you know some basic chemistry. it is made by dipping pure cotton into the nitrating mixture. The Hydrogen atoms in the cotton molecules will get replaced by nitrate and become nitrocellulose.