Apple's iTunes-store video container — nearly identical to MP4, except when FairPlay DRM locks it to your Apple ID.
M4V is Apple's own variant of the MP4 container, used historically for movies and TV shows sold or rented through the iTunes Store, and still used today for some podcast videos and Apple-ecosystem video exports. Structurally, M4V and MP4 are close enough that many M4V files play in any MP4-compatible app without issue, and Filemorph's video tools treat the two the same way for files that are not protected. The exception matters a lot in practice: iTunes movie and TV purchases are typically wrapped in FairPlay, Apple's DRM system, which encrypts the video so that only an authorized Apple device signed into the purchasing Apple ID can play it back at all — no converter, on-device or otherwise, can process a FairPlay-protected M4V, since that protection is specifically designed to prevent exactly that. An M4V that is not DRM-protected, such as an exported podcast episode or a home video saved in that container, converts the same way an MP4 file does.
iPhone, iPad, Mac, and Apple TV all play M4V natively through Apple's own apps. Many non-Apple video players also open unprotected M4V files without issue, since the underlying container is nearly identical to MP4. A FairPlay-protected M4V — most iTunes movie and TV purchases — plays only through Apple's own apps on a device signed into the purchasing Apple ID.
An M4V that plays fine on an iPhone may still need converting to reach an Android device, an older Windows program, or a platform that specifically checks for MP4. As long as the file is not FairPlay-protected, Filemorph handles that conversion on-device the same as it would for MP4.
Filemorph can convert M4V to MP4 on-device — identical container structure, useful when a destination app or platform specifically checks the file extension for MP4.
Filemorph converts .m4v files entirely on-device on iPhone, iPad and Mac — no upload, no account, and it works in Airplane Mode.
Relevant operations in Filemorph:
Movies and TV shows purchased or rented through the iTunes Store are typically protected with Apple's FairPlay DRM, which encrypts the video so it only plays on an authorized Apple device signed into the purchasing Apple ID. No app, Filemorph included, can convert or bypass that protection — it's designed specifically to prevent it.
No. Only content sold or rented through Apple's stores is typically FairPlay-protected. An M4V exported from a podcast, an app, or a personal video project usually carries no protection at all and converts the same way a regular MP4 file does.
No. For M4V files that are not DRM-protected, Filemorph converts and edits them entirely on the iPhone or iPad, the same as any MP4, with no upload and no internet connection required.