Here is a video clip showing some of the footage from the 2012 league-wide tryouts for the Frontier League. It was a tryout that drew nearly 300 prospective players and offered these players exposure to all 14 teams that the league had at the time.
The Frontier League is running its tryout again this spring so sign up for the notification service to get the date, time and location for this tryout and tryouts for other independent teams and leagues.
Become aware of upcoming tryouts by joining the notification service here: Independent Minor League Pro Baseball Tryouts
If you need some help increasing your 60 yard dash speed times, arm velocity, vertical leap ability, hitting power or improve your muscle mass for any professional baseball tryout (or private workout) then here are some resources to help you: Resources for improving your chances at any pro baseball tryouts