: 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.
: Software like Adobe Premiere Pro often creates "proxy" files (lower-resolution versions of raw footage) with simplified names for easier editing. g_147.mp4
: If your default player won't open it, use the VLC Media Player . It can play almost any MP4 file, even those with missing headers or unusual codecs. : GoPro cameras use specific naming conventions like