Iphone video no picture with sound
I just upgraded to Iphone 16 pro max, I'm on IOS 18.1. I make a lot of videos on my phone, I also sometimes save the ones it makes (memory videos) and I am having trouble downloading them with my new phone. I watch the videos on the phone I have pictures and sound, but when I download them and try to play them all I get is sound. They are saved on my phone and work fine there. I changed the settings to most compatible. I have unmuted them, I have tried different cords. I don't know how to get the complete version of these videos off my phone. Any suggestions?
PS all photos visuals are mine, no screen caps or copyrighted stuff.
PPS I am downloading to Windows (which I have done successfully for years)
iPhone 16 Pro Max, iOS 18