This is typically a unique hash or "blob" ID. Platforms like Reddit, Twitter/X, or Discord use these strings to reference specific media assets stored on their servers.
Since it is an .mp4 , it can be opened by virtually any modern media player, including VLC, QuickTime, or Windows Media Player. MP4 files explained: How to open and use - Adobe 0h8tnjl863s8eafp2mcgy_source.mp4
If this was in a cache folder or a downloaded zip, look at the parent folder name. Often, these IDs are used by platforms like Adobe Creative Cloud or Microsoft Windows for temporary storage. This is typically a unique hash or "blob" ID
The string appears to be a unique, system-generated identifier for a video file, likely originating from a Content Delivery Network (CDN) or an automated social media upload process. Breakdown of the Identifier MP4 files explained: How to open and use
If you have found this filename and want to know what it contains, consider the following: