Notes about the XVO file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The XVO file type is primarily associated with 'ratDVD' by RatDVD - Canada. ratDVD provides a way to encode a complete, full featured DVD in one file. ratDVD takes a full featured DVD-9 movie and puts it into a highly compressed .RATDVD container format file of about 1.x GB in size while preserving all the features of the original DVD. [Note: If you can see the .XVO and .VSI files inside the ratDVD file you have done something wrong. WinZIP and WinRAR can see these files but they will not play outside of the ratDVD container.]