This is an excellent youtube channel to see very cool slow motion footage caught on High-Speed Cameras. Often using the Phantom 4K Flex, and other world class camera technology, there is a ton of inspiration on cool things to film in super slow motion. This highly entertaining Youtube Channel can be found here: https://www.youtube.com/user/theslowmoguys/videos
The Slow Mo Guys is a science and technology entertainment web series from Thame, England, United Kingdom that is created by Gavin Free, starring himself and Daniel Gruchy. It has been described as the biggest channel for slow motion videos on YouTube.
The series consists of a wide variety of things filmed in extreme slow motion using a range of Vision Research Phantom high-speed cameras, capable of shooting over 380,000 frames per second. The series premiered on 15 October 2010.