Continuing the discussion from IMPORT MY VIDEO FILE (MP4) INTO TWIN motion 2024 version, this info is nowhere to be found:
I finally figured it out. I have TM2024.1.2, MacBook Pro M3. Go to Library/Materials/Video. Drag sample video on to surface. In properties menu-Video menu there is a small folder icon on right click and choose open. Go to folder than contains video and open, and wah lah it places video on surface.
From there you can right click material and add video to user library.