: Many dashcam brands (like Kehan or VIOFO) use "KM" or similar prefixes to denote "Key Moment" or locked files that are protected from being overwritten.
: MP4 (MPEG-4 Part 14), the most universally compatible format. km_20220814-2_720pmp4
: Upload the MP4 to Otter.ai or use Descript to generate a full transcript with timestamps. : Many dashcam brands (like Kehan or VIOFO)