I use this to introduce the Percussion Family of Instruments to my students. I normally choose some recognizable rhythm from a song to go behind it as inserted audio to start at the same time as the video on PPT. I didn't want to get into any copyright trouble. Free stock images came from Unsplash.com.
This is also great for giving students something to watch while "conferencing" with any student or students who need a quick pep talk just outside your door.