This is likely a Base32 or UUID-style hash. Servers use these to ensure that every uploaded file has a completely unique name, preventing one user's "video.mp4" from overwriting another's.
If you recently ran file recovery software, it often assigns these strings to files where the original metadata (the real name) was lost. Safety and Content 0hbmbb1tzglkvu2g9g40i_source.mp4
Files with this exact naming structure are frequently seen in: This is likely a Base32 or UUID-style hash
If you right-clicked a video on a platform like Reddit or Discord and selected "Open Link in New Tab," the URL often contains these long alphanumeric strings. 0hbmbb1tzglkvu2g9g40i_source.mp4