This is a marvellous example of what a single filmmaker can make out of thin air shot with real-world subject matter the film industry would consider “nothing”, using a tool that most pros would think is barely beyond “nothing” too.
This is an article not about licensing music. Music should always be paid for when the artist makes money from the work of others. This article is instead an impassioned plea for unrestricted use of music in non-profit personal videos, as long as the artist is credited. However there is a worrying trend of some recording artists who look negatively at their work being used in non-commercial films without prior permission – they are missing the spirit of what creativity is, and the opportunities afforded by the internet.