.MP4 File Extension
Full form: MPEG-4 Part 14
What is a .mp4 file?
The most widely supported video container. It stores video, audio and subtitles in one file. Files that end with .mp4 belong to the video family of file types, so your computer links them with a suitable program automatically.
Where is .mp4 used?
YouTube uploads, recorded classes, mobile videos and movies. Because the format is so common, almost every modern device and software understands it.
Examples of .mp4 file names
class.mp4, movie.mp4
How to open a .mp4 file
You can open it with: VLC, Windows Media Player, any phone. If it does not open, check that the file is not damaged and that you have downloaded it fully; also confirm that the extension was not renamed by mistake.
Quick tips
Never rename a file just to change its extension, because that does not convert the data inside. Use a proper converter or the Save As / Export option. Keep a backup copy of important video files before editing them.