A coach's primary responsibility is to motivate the student or client to achieve their potential in any area or areas that need improvement. They also develop specific skill sets and goals important to the job or type of recreation.
What is HUDL SIDELINE
Hudl Sideline is a coaching devices that can review the play that just happened and relay the video to you so you can correct what went wrong.
https://www.washingtonpost.com/sports/highschools/a-technological-arms-race-new-replay-devices-widen-the-gap-on-high-school-sidelines/2016/11/14/ffb59476-9c79-11e6-b4c9-391055ea9259_story.html?utm_term=.3ff3a14d0ba2