Located in the VIDEO_TS folder, VOB stands for DVD Video Object and it represents the movie data file from a DVD disc.
Since VOB files store most of the data on the disc, such as audio, video, subtitles and interactive menus, one needs to be very careful when exporting these files to other formats.
Considering VOB files can only be accessed by specialized applications, users have the possibility to convert them to other formats that are supported by more utilities.
Also, they will also be able to use the same dedicated software solutions for previewing the contents of the VOB files.