: This typically denotes the second segment of a larger recording. Many cameras use "loop recording," which breaks long videos into smaller 3-minute or 5-minute chunks to prevent data loss.

If you are trying to access or repair this specific file, follow these steps:

: This naming format is frequently seen in evidence submitted for insurance claims or "idiots in cars" compilations.

: This is often the manufacturer's prefix. It is most commonly associated with R-Tech or Reolink security systems, or certain generic Chinese-manufactured dashcams and body cams.