Publish on 3/7/17 
American football, referred to as football in the United States and Canada, and also known as "gridiron football" or simply "gridiron", is a sport played by two teams of eleven players on a rectangular field with goalposts at each end. ... The team with the most points at the end of a game wins. 
 Video has a re use permission. my object is to teach how to play football and i give credit to owner . link - 
www.youtube.com/watch?v=PSP42z4yHOQ 
 
Thank you