Ostwald Oxidation of Ammonia
The beautiful incandescent reaction of ammonia requires a red-hot catalyst, in this case platinum wire. Here we have a flask of ammonia (the clear liquid), which is being enriched with pure oxygen (coming out of the tube). A piece of platinum wire is super heated and introduced into the flask because a very high temperature is needed to initiate and speed up the reaction. In this GIF, apparently a phenomenon known as an ‘inverted flame’ is happening.
The chemist Ostwald discovered a way to react oxygen and ammonia - the first step in nitric acid manufacture in agriculture.
video source with lots more information
Nice and simple explanation of what is happening here