If the file is too large (common for "source" files), it can be converted to smaller MP4 variants for easier sharing.
This alphanumeric string is likely a hash or Unique Universal Identifier . It is used by databases to track a specific file without relying on human-readable names, which could be duplicated. 0gxvoihlsjhjlgr7da1uu_source.mp4
The name follows a standard convention for managed video assets: If the file is too large (common for