Hey Patricia! These VOB files are “Video Objects” and part of the standard file structure of a DVD movie. It’s completely normal that you can’t play these files because they need process to something like an MP4 file using software such as HandBrake. I cover this format in lots of detail in my new course. I don’t think I’m allowed to post anything about it here, but if you go the The Photo Managers group on Facebook you can find a link in the Promo Money thread.