What is the typical function of video files supported by the MP4 format?

The typical function of video files supported by the MP4 format is to provide multimedia content, particularly video and audio, in a highly compatible and efficient manner. MP4 is designed to hold various types of data, including video, audio, subtitles, and even still images, which makes it suitable for a range of applications, from streaming to downloading.

While some MP4 files may incorporate Digital Rights Management (DRM) to protect copyrights, this is not the primary function of the format itself. Instead, the MP4 format is generally recognized for its ability to compress high-quality video and audio, making it ideal for playback across multiple devices and platforms.

In contrast, options regarding storing audio only, displaying high-definition images, or summarizing film content do not accurately reflect the primary capabilities of the MP4 format. MP4 files are versatile in that they can contain both audio and video, making them a popular choice for numerous multimedia applications. However, the essence of MP4 is not just about DRM protection, but rather about its overall function in delivering audio-visual media.