Hello,
Because "EXIFtool_2-2.zip" (2005) is from Marcel Mueller and it is a .exe binary with it's source code.
ExifTool Perl Module (ExifTool_Perl_9-46.wpi) (2014) I have no idea how to use it.
Martin, according to its description this version from Marcel Mueller doesn't handle mp4 videos which is my basic intention.
I downloaded https://exiftool.org/Image-ExifTool-13.27.tar.gz, it doesn't even need installed. You should install some other Perl packages, see the README, then open ANPM, go to the available packages, scroll down to perl and you should be able to guess which packages supply stuff, eg the 1st 2 requirements,
Dave, thank you very much for this possibility.
I alread made a quickcheck and could successfully read the recording date of one of my mp4 videos. So it does what I want by using an up to date Perl installation

and I don't need to worry further about the 9-46 WPI package any longer.
Background of my question is to treat the videos of my camera in a similar way as my jpg photos.
I have a REXX procedure which renames my photos in a sequence which follows the shooting timestamp of them.
PMView can easily set the file timestamp to the shooting timestamp in the EXIF data. So I don't have to care about the timestamps when the jpgs are written to my PC or when I have worked on them. Of course, PMView doesn't care for videos.
That is where the EXIFTool comes in. I now can read out the recording dates of my mp4s and I'm planning to use touch.exe to set the file date(s) accordingly.
Thanks Dave as well for your Dooble translations and all of you for your responses in this matter.
Hansi.