Steps

• Run the bash scripts given below.
• The time format is in ISO8601.

Link

ffmpeg -i <original.mp4> -c copy -map 0 -metadata creation_time="2015-12-25T12:34:56" <output.mp4>

# To check the tag
ffprobe -show_streams -show_format output.mp4

OS

• Unix-like

Required Tools

• ffmpeg