Vid_20221223_135347_155.mp4.mkv Here

The filename VID_20221223_135347_155.mp4.mkv suggests a few key details about its history:

Standard video editors (like iMovie or some versions of Windows Photos) often struggle with MKV. You may need to convert it back to MP4 if you plan to edit the footage. User Perspectives VID_20221223_135347_155.mp4.mkv

The .mp4.mkv suffix indicates it may have originally been an MP4 file that was later wrapped into an MKV container, or it was renamed/converted using automated software. The filename VID_20221223_135347_155