Roblox, one of the most popular kids’ apps in the world, is now requiring children as young as nine years old to submit a video selfie for age verification.

Ampere Analysis, a UK-based research and analytics firm, surveyed 34,428 people across 22 markets about their gaming habits and preferences.

Roblox will soon require that users go through an age estimation process if they want to be able to chat with other people on ...