Let Gom Player Open All Videos
If you say Let Gom Player Open All Videos on your computer, you should make the following settings: Enter Gom Player settings (F5). Then, in the File Types section of the Others section, press the Select All key and exit the settings. So all video formats are now automatically opened by Gom on your computer. You can make Gom open or not by clicking or unchecking the format you want from the list here.