It can store video, audio, images, and subtitles in a single file.
The .mp4 format (MPEG-4 Part 14) is used globally because of its versatility: 41 (3)mp4
While not a singular "viral" video, this specific string has appeared in various niche contexts: It can store video, audio, images, and subtitles
It is supported by nearly all modern operating systems (Windows, Mac, iOS, Android) and social media platforms. It can store video