When a video is shared multiple times or saved from a chat, apps often rename the file sequentially.
Certain dashcams, security cameras, or older digital cameras use alphanumeric prefixes for video files. b5 (3).mp4
If you are using video editing software (like Adobe Premiere or CapCut), "b5" might be a shorthand for . The "(3)" would suggest this version of the export or clip was saved three times. How to Identify the Content When a video is shared multiple times or