I don't know if this has been done or if you guys have any other favorites but i have a ton that i follow and look for regurlarly. This one is a Medical Doctor that shows some great stuff ranging from fractures to NBC decon to some pics at the sniper school he loaded up. All in all a good channel for good starter information. Also on the same note he did a great podcast interview with Jack Spirko of The Survival Podcast. What are your favorite channels and why?
http://www.youtube.com/user/SurvivalMedicine
http://www.youtube.com/user/SurvivalMedicine