My iPhone is USB-connected to my macbook and my macbook has internet sharing turned on.
How can i send a video file from my macbook to the iphone using the command line?
[Not a full answer; not re CLI] I don’t know if the transfer is possible in a useful manner, but look at iExplorer from Macroplant & especially its feature to use device as USB drive. Whatever limitations exist to this (e.g., no root directory access) would suggest to me that those limitations are fundamental to iOS.