Not sure if this has been posted before, but I have only recently found this series of Google Talks. Google talks cover more subjects than just photography, but it is very cool that photography is one of the major subject areas. There are a number of well known photographers who are speakers at these talks. One of my favourite photographs is Art Wolfe and I do recommend you check out his talk. I love his focus on composition and the art. Anyway, check it out.
https://www.youtube.com/playlist?list=P ... kSYtdOkLpgDG