If you have found this file on a hard drive or SD card and want to see what it is:
: Many digital video recorders (DVRs) save clips using a single letter and a sequence number (e.g., G for "Gate" or "Group") to organize surveillance logs. How to Review the Content Yourself g_147.mp4
: GoPro cameras use specific naming conventions like GHxxxxxx.mp4 (H.264) or GXxxxxxx.mp4 (HEVC). A file named g_147.mp4 suggests a custom or legacy camera setting where "g" stands for the device and "147" is the sequential clip number. If you have found this file on a