For those videos you can play smoothly in QuickTime, you can use the export to Apple device command in the $30 QuickTime Pro or QuickTime X (Free) to create a video that will play on those devices. But QT pro doesn't support all file types, doesn't have a batch-encoding feature, and won't let you change its settings. This is why you need a M4V converter for Mac that is able to convert your videos or DVDs to M4V format so that you can play them with native Quicktime.
Recommend the Best M4V Converter - iSkysoft iMedia Converter Deluxe
iSkysoft iMedia Converter Deluxe for Mac, which is a all-in-one Mac M4V video converter that supports conversion between M4V and other video formats. It can easily and quickly converts your vast collection of DVDs (commercial DVDs included), home movies, and other video files to M4V file or convert M4V files to other formats. It supports batch conversion and works several times faster than QuickTime Pro, and works with many other video formats that QuickTime Pro does not support natively.
Note: This Mac app is not available for converting DRM M4V files but the Windows version works with DRM protected M4V files.
Tutorial on Converting M4V Videos with iSkysoft
Launch the Mac M4V Converter, drag and drop your source DVD movies or videos to the program.
iSkysoft iMedia Converter Deluxe for Mac helps you to convert M4V videos to other popular formats like MP4, AVI, MKV, as well as device supported formats like iPhone, iPad, mobile phone and more. You can input M4V videos and select video types you want to convert to in the window.
To convert videos or DVDs to M4V, you can select "M4V" from the "Video" category. Of course, you can choose to convert M4V videos to any format as needed.
Note: You can choose according to the name of your devices like iPad Pro, iPod touch, iPhone 6S and more, and this smart M4V Mac video converter will convert the videos to a format and size suited to the selected target device.
Hit "Convert" let this smart iSkysoft iMedia Converter Deluxe for Mac to do the rest for you! When the conversion is done, you can enjoy your output files in the living room, on the fly, in the gym, or import to video editor to create your own masterpiece. This Mac M4V video converter is specifically designed for Mac OS users, including Mac OS X 10.5 Leopard, 10.6 Snow Leopard, 10.7 Lion, 10.8 Mountain Lion, 10.9 Mavericks, 10.10 Yosemite and 10.11 El Capitan on iMac, Mac Pro, MacBook, MacBook Pro, MacBook Air, etc.
Tip: If you only need convert M4V to video file formats like YouTube files, 3GP, FLV, DV etc. or used to play them on iPad/iPhone/iPod etc. you can read these step by step guides for the conversion: M4V to YouTube Mac, M4V to AVI Mac, M4V to FLV Mac,etc.
Optional: Free Online M4V Converter
You can also try online video converter to convert your M4V videos to any format, if you don't want to install a computer program. Try it below: