Used to make videos about all sorts of interesting subject, from weird elevators to lighter than human propelled vehicles to weird stuff people do. He stepped away because it was a bit much, he strikes me as the type to really enjoy sharing information but not the type to enjoy fame, although I can only comment from how he comes across in his videos.

https://www.youtube.com/watch?v=jplrbxI5GN8 this is one of my favorite videos of his