Video Upload Issue

Hi! 

I take a video each day of something significant. At the end of the year I compile my videos to create a movie of the year's memories. 

I got a new phone this summer (iphone 16 pro), and none of the videos taken on my new phone will upload. All of my videos taken on my previous iPhone (13 pro), uploaded successfully. 

Both phones were taking the same type of video -- 1080p. 

Please help! This is my favorite thing to compile each year. 

Thanks!!