Looks like what is called "grain" in solid rocket fuel. It has all the components to have a constant / violent and long term burn. If it is "grain", I hope you have life / medical insurance before you go messing with it or you have the knowledge how to use it in the right proportions.
googled it well it could be it atleast the flame looks the same .. and B*ch plz i know what i`m doing i did this shit whene i was in 4 grade j/k(not the part about the 4th grade the j/k refers to "B*ch")
its not hard to make only i have so much to make i think one last rocket ... will try to film it