Confirm file integrity: check for truncated container, missing moov atom (common in corrupted mp4s) using mp4box or AtomicParsley.
Verify that codecs match declared formats: a mismatch between container metadata and actual codec bytes can indicate rewrapping or malicious wrapping.
Analyze bitrate and motion vectors (ffprobe + ffmpeg) to determine if content is consistent with claimed recording device (e.g., smartphone footage vs. screen capture).
SSIS and Video Files
Depending on what "SSIS-988" refers to, you could delve into a specific aspect, such as:
If "SSIS-988.mp4" refers to a specific video tutorial or error code related to SSIS, please provide more details for a more targeted response.