This is the try not to laugh challenge

The video likely worked due to the unexpected contrast between the bald man's exaggerated attempts to elicit laughter and the grandpa's stoic demeanor, followed by the grandpa's own surprising facial expressions that ultimately broke the comedian's composure.

In a try not to laugh challenge, a bald man known for making funny faces attempts to make an elderly grandpa laugh. Despite the bald man's exaggerated expressions, the grandpa remains stoic. The grandpa then makes his own funny face, causing everyone to laugh, and advances to the finals against a comedian who also struggles to maintain composure.