Need Some Help With Apple TV app on iPhone

What’s the easiest way to transfer video (or anyway) from my Mac into the Home Videos Folder of the TV app on my iPhone? This used to be so easy back in the iTunes days but I can’t see how to do it now. I can transfer videos in the opposite direction. My phone is plugged into my Mac via USB.

Not sure about the TV app, as haven’t used that for a long time.

It is relatively straightforward for VLC (recently did so on my iPad). USB connected, ends up opening in Finder for direct transfer (not always clear when transfer is finished though)