Back home, Wall’s loved ones are honoring that message and raising money to celebrate his life. A GoFundMe launched by his sister has raised more than $27,000, well above its $20,000 goal.

As Mr. Beast challenges a man -- Majd -- to lose 100lbs by living in a gym for a year with the help of personal fitness coach Tyler Wall, his coach dies two months into the challenge.

Wall died unexpectedly on Feb. 18 at 38 years old. The video release, by Mr. Beast, was called “Lose 100 pounds win $250,000” included the heartbreaking news of Wall’s death.

The news of the unexpected death of longtime former Southington resident Tyler Wall was part of the centerpiece of a viral YouTube video that was released on Saturday, and it brought an outpouring ...