Vid_20221215_105814_430.mp4.mkv [360p 2027]

Likely a millisecond or sequence identifier used by the camera software to prevent naming collisions.

If the original MP4 was corrupted (e.g., missing a "moov atom"), recovery software often outputs to MKV to stabilize the stream. 2. Forensic & Deep Feature Extraction VID_20221215_105814_430.mp4.mkv

If this was a screen recording rather than a camera capture, you might find a variable frame rate (VFR). If it's a camera capture, it likely uses H.264 (AVC) or H.265 (HEVC) video codecs with AAC audio. Likely a millisecond or sequence identifier used by

This "double extension" suggests the original MP4 file was re-wrapped into a Matroska (MKV) container. This often happens during: missing a "moov atom")