Just below the broad smile he’s been wearing all morning, John Ternus’ hands are shaking.

On this September day in Silicon Valley, Apple’s new CEO is surrounded by celebrities, tech enthusiasts, and reporters who have flocked to Apple Park from around the world to catch a glimpse of the company’s new and long-awaited foldable phone, the Duo. After Ternus takes a few photos with the device, an Apple PR rep pulls the influencer known as IShowSpeed out of the crowd to meet him. Winning over the 21-year-old isn’t exactly the toughest assignment Ternus has faced in his 25-year Apple career: Speed barks when he sees the phone and then gleefully springs into a backflip.

But IShowSpeed also happens to be livestreaming the encounter to his 61 million subscribers on YouTube. And as Ternus thumbs through the $1,999-and-up phone, attempting to drag a photo into a text-message box, eagle-eyed viewers notice his hands quivering. Ternus later explains that he didn’t sleep much the night before.…