omarscu - Power System Protection (MCH 416) - 2018-2019 - Google
Many dashcams save the front camera recording as CH1.mp4 and the rear as CH2.mp4 . 2. Educational & Lecture Series ch1.mp4
Systems like the Meitrack MDVR export files as CH1.mp4 , usually representing the main or front-facing camera. omarscu - Power System Protection (MCH 416) -
In surveillance or dashcam systems, "ch1.mp4" typically refers to the video feed. ch1.mp4