TikTok's user activity has overtaken YouTube's in the United States and UK, though the app still lags behind in South Korea and Japan, according to an analysis of Android devices by App Annie.

Why it matters

Both platforms are expected to benefit from a shift in marketing budgets, with online video, influencer content and social media seeing the greatest planned increase in 2022.

For YouTube, the quickest growth is coming from connected TV devices, while TikTok is expanding its user base to older audiences. Additional research shows most TikTok users are female and younger, while YouTube is more popular with...