If the "(256)" refers to technical metadata rather than a filename:
It might refer to SHA-256, a security hash used to verify that a video file hasn't been tampered with. Dod (256) mp4
"Dod" is used as a shorthand for "Download" or "Documented." If the "(256)" refers to technical metadata rather
Depending on what you are looking for, here are the most likely contexts for this file: Viral or Meme Content Dod (256) mp4
You might see this name in shared Google Drive or Mega folders where: