.m4v

iTunes video, Apple's MP4-based container for video purchased or rented from the iTunes Store

Dedicated renderer

Format facts

MIME type: video/x-m4v
Apple UTI: com.apple.m4v-video
Stock Quick Look: no stock preview
Planned approach (census): special-renderer
Icon hint: plays
Prevalence: universal

Renderer note (from the census)

macOS plays M4V natively, handles FairPlay DRM

Gotchas: Apple ecosystem