See all time information of a file
exiftool -Time:All -G0:1 video.mp4
Set time zone to a photo
exiftool -overwrite_original -P -EXIF:OffsetTime="+02:00" -EXIF:OffsetTimeOriginal="+02:00" -EXIF:OffsetTimeDigitized="+02:00" FILE.JPG
Add a time zone tag to an existing video
exiftool -overwrite_original -P -api QuickTimeUTC -CreationDate="2022:06:06 17:00:00+02:00" FILE.MP4
Set all time info to a given time WITH time zone (will set correct UTC time for QuickTime)
exiftool -overwrite_original -api QuickTimeUTC -wm w -time:all="2022:06:06 17:00:00+02:00" -FileCreateDate= FILE.MP4