This specific file likely contains technical metadata such as the resolution, frame rate, and codecs (like H.264 or HEVC) that allow devices to play it smoothly.
MP4s are widely supported across almost all modern devices and can be opened with standard software like Windows Media Player , QuickTime, or the VLC media player . How to Check the Content
It acts like a "box" that holds different data tracks, including video, audio, subtitles, and images.
If the "4OLVAnlE" part is a YouTube ID, searching for ://youtube.com might reveal the original source.
MP4 files explained: How to open and use - Adobe