Nikon d3400 not showing videos?

I'm trying to transfer the file from my Nikon d3400 to my mobile phone or laptop. However, only the photos are shown to me. How do I get to the videos?

I just can't get the videos transferred because I can't see them. Hope to have helpful tips from you

Ever read the manual?

Then that doesn't happen.

https://www.nikon.de/de_DE/product/software/snapbridge

What is the format of the videos, is it Nikon compatible?