Hydrogen and its properties
This online resource is a video (5:19 minutes) that gives a demonstration of some of the properties of hydrogen, and in particular, its flammability.
It also introduces the concept of using hydrogen as a fuel, with the only by-products being heat and water.
This video could also be used to increase students' general knowledge of gases.
This resource is iPad friendly and could be used as an introduction to the topic of combustion chemistry.