Nature, sport, adventure, fashion, ... Some great documentaries about photography and photographers: http://resourcemagonline.com/2017/05/31-inspiring-photography-documentaries-every-photographer-must-watch/78295/. My favorite one is not about surfing or similar, but the the story of Bill Cunningham, the soul of New York fashion and street photography, as well as a delightful and humble human being. https://www.youtube.com/watch?v=_Je_jxIPl5Y
For the photographer understanding color is important as to know the light. Take a look at this video, you will surely find something interesting.