HawkShack.com

Some of you may have seen this documentary. I'm not sure when it was made, but it has to be well over 10 years old. NFL Network used to feature it once a year during the offseason. It's "Full Color Football", a 5 part documentary on the history of the American Football League and the beginnings of what most regard as the beginning of the modern era of professional football. For anyone that grew up in the 60's like I did, it's must-see TV, and even if you didn't, it's still a great watch for any dedicated football fan:

https://www.youtube.com/watch?v=_7OA6koTK_E

Edit: First aired in 2009.