Not sure what you are saying with your response.
The original request was for info about DVDFab installing (or using) the latest codecs to obtain max. speed & quality coding for his mobile device.
My answer was that DVDFab (and by implication, VSO) don't install (or use) any codecs at all (for conversions)... that it was his responsibility to keep updated with current codec versions.
I tossed in the bit about DVD players and Audio players hoping he'd twig to the fact that coversion for a device doesn't depend on the installed codecs... codecs are only used for playback...(DVDFab is the conversion application, VSO is the burning app., not a playback app.).
A point you seem to have missed - how do you think DVDFab generates its preview window for Main Movie or Mobile conversions?