Chris Pavlovski, the CEO of Rumble, a popular video-sharing site, has made a dramatic exit from Europe. His departure comes in the wake of a high-profile arrest that has sent shockwaves through the tech world.

The arrest in question involves Pavel Durov, the founder and CEO of Telegram, a major messaging app. Durov was detained by French authorities at a Paris airport after arriving from Azerbaijan on a private jet. The reason for his arrest hasn’t been officially announced yet, but rumo...