Rockblackdoll.m4v

“M4V is Apple's version, which adds optional DRM-encryption. So if the video is DRM-protected... it should stay as m4v.” Reddit · r/PleX · 8 years ago

Tools like HandBrake often default to this extension because it supports specific features like AC3 audio and chapter markers that older Apple players require. Community Perspectives RockBlackDoll.m4v

“The extensions mpa and mpv are just to be more explicit of what they contain. mp4 is the generic.” Reddit · r/handbrake · 6 years ago “M4V is Apple's version

Users often find the M4V format confusing due to its similarity to MP4 but restrictive nature on non-Apple devices. RockBlackDoll.m4v