Photos timestamp problem with videos

Hello,

I have a few videos that I wanted to import into Photos, and I have changed the exif of them using the exiftool in order to assign the proper timestamp.

However, when I import them to Photos they are assigned to the wrong date, and specificaly to  28 april 190420.

I checked the exif and it looked fine, and did the process with a few photos without problems.

What can I do?