Knowing the platform (e.g., a forum, a cloud drive, or a security app) will help identify exactly what the file contains.
Many dashcams save the front camera recording as CH1.mp4 and the rear as CH2.mp4 . 2. Educational & Lecture Series
Platforms like Patreon or Google Sites often host chapter-based videos for book read-alouds or software tutorials labeled this way. 3. Programming & Video Scripts
Professors often post links to recorded sessions using this format, such as "Lec1-ch1.mp4" (Lecture 1, Chapter 1).
