0gq99astb84oww0e2hrb7_source.mp4 -

: It allows for efficient streaming over the internet.

: Beyond video and audio, it can store subtitles and still images within a single container.

: It is recognized by almost all video creators and can be played on most devices without additional software.

If you are having trouble playing or opening this specific file, you can try using the VLC media player which supports nearly all video formats. How to Create and Open an MP4 File

While this specific filename is usually generated by automated systems, its "good features" stem from the underlying format: