0h147u4bt2fstxh24b4p0_source-erlurz9j.mp4

The system creates different versions of the video for various internet speeds. The "source" tag in your filename suggests this is the original high-quality version before it was compressed for mobile viewing.

Do you remember you originally downloaded this file from? How to play MP4 files in Windows - Microsoft Support 0h147u4bt2fstxh24b4p0_source-erlURZ9j.mp4

If you are having trouble viewing the file, tools like VLC Media Player or Windows Media Player are standard for opening MP4 containers. The system creates different versions of the video