Enter Robby Motz, the new face of =3. With 10.6 million subscribers, Johnson made a name for himself on YouTube through his biweekly show that featured the craziest and best viral videos of the week.

Ray William Johnson, who rose to Internet fame with his long-running YouTube comedy series “Equals Three,” has selected a new host for the show: Robby Motz, a 20-year-old theater student who ...