M4V is a video file format that has been downloaded from the Apple iTunes store. The format contains TV shows, videos, films, music. It looks like a .MP4 file, but it sometimes has copy protection when Apple's FairPlay DRM is used (technical copyright protection). The M4V format, i.e., MPEG-4 iTunes Video File, was developed by Apple. MP4 is a container format. Like the same formats as MOV, AVI, MKV, it provides the ability to combine a variety of multimedia streams into one file. Mostly it is audio and video. In order to play the protected M4V file, the computer must be authorized using the iTunes account from which the videos were purchased. In this case, it can be used in order to buy video. Unprotected M4V files can be played by other video players if the extension is changed from .M4v to .Mp4. Files with the M4V extension contain both sound and video data. You can convert M4V files to MP4 format. In this case, it will be possible to play them on other computers, since the M4V files are protected by DRM. MP4 files, compared to the M4V format, do not allow you to specify partition information.
SWF is a flash animation file format created as a flash development application. In particular, for Adobe Flash. Users of the global network had to watch advertising animations when the picture “comes to life” and changes, you just have to point the arrow of the manipulator on it. This format has gained great popularity in the global network, because it uses videos and banners, as well as special flash-games. Such files usually contain text or animation, in which there are inserts of vector, bitmap images, audio tracks, as well as scripts in the Action Script language. This extension belongs to the category of video files. This format was created in 1995 by the Future Wave Software group of Americans. At that time, Future Splash Animator had the SPL extension. A year has passed. Macromedia bought the extension rights and gave the application a new name - Macromedia Flash. And then, in 2005, this company was acquired by Adobe. It was then that the beginning of the modern history of this expansion was laid. In order to open files with the extension SWF (Small Web Format), you need a special application Adobe Flash Player or a web browser that works with Flash technology. In the browser, Goggle Chrome is a built-in flash player, and therefore there is no need to install anything additionally. Anyone who uses a browser, say Mozilla Firefox, Internet Explorer and others, must install the Adobe Flash module. Creating a SWF file will require Adobe Flash (Professional or Builder).