Because after watching this video by achievementhunter has shown me that American football not a very international sport like soccer(or futbol),basketball,hockey,cricket,golf or baseball.
And I'm guessing most British folks would end up like Gavin from roosterteeth having no idea what a "offsides" or "quarterback" or even how to pronounce this man's name right.
and if you are having trouble this handy dandy picture guide can help you
Quarterback=Leader of the football team and he throws the ball
offensive line=they protect the quarterback
running back=the quarterback hands/toss the ball to him so he can run with the ball
wide receiver=he catches the ball from QB(aka quarter back) and runs
Tight End=in for blocking rushers(aka linebackers) or quick outlet pass
Defensive line=ties up the offensive line to let rushers(aka linebackers) to sack the QB
LineBackers=to rush and sack the QB or make openfield tackles on running backs,wide receivers and tight ends
Safety=hangs in the middle zone to help out conerbacks cover wide receivers or tight ends
Corner backs=try to stop wide receivers
Touchdown=6 points
extra point field after touchdown=1 point
2 point conversion=optional play after a touchdown to go for 2 points
field goal=3 points
safety=2 points(when the defense sack the QB in their endzone)
FYI:this is quick rough guide to football but I think yall get the idea.
(we all know football is a manly sports so no women or gays allowed.........jk jk jk)