10-25-2020 11:01 AM
GH - video compressed with H264 codec (or jpeg pictures)
GX - H265 (HEVC) codec
GX010223.mp4 is the first chapter (4GB) of the video
GX020223.mp4 is the second chapter (4GB or less) of the same video
GX010224.mp4 is the first chapter of the video that came after 223 ...
pictures have more numbers in the name ....GH01056789.jpg
hope this helps you,