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
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. 0h8tnjl863s8eafp2mcgy_source.mp4
Copying the alphanumeric part into a search engine might occasionally link it back to a specific post on a forum or social media site if the raw link was ever shared publicly. The string appears to be a unique, system-generated