: It works on almost every device, including smartphones, PCs, and smart TVs.

An MP4, or , is a digital multimedia container format. It is the most common video format used today because it balances high video quality with small file sizes.

: A standard video should have a reasonable file size (usually several megabytes or gigabytes). If a "video" file is only a few kilobytes, it might be a script or a shortcut instead of an actual movie. How to Create and Open an MP4 File

: Beyond just video, an MP4 can store audio, subtitles, and even still images.

If you have downloaded this file, you can typically open it by double-clicking. Most modern operating systems have built-in players: : Uses Windows Media Player . Mac : Uses QuickTime Player .