Why it worked
The video uses relatable humor by contrasting men's potential lack of fitness knowledge with the act of working out, making it shareable and engaging. The clear announcement of a free challenge on a specific app provides a direct call to action.
Summary
This video humorously showcases men's reactions to learning what a pulse is, interspersed with clips of people doing arm workouts. The caption announces that @gracefreyrefit's FREE 5 Day Arm Challenge is dropping on the FORM app tomorrow, August 3rd.