The easiest thing for you to do is downloads some videos of Limewire in different formats then burn as data disk and try it out in the store before buying.

Converting is timeconsuming and sometimes hard to do depending on format + degrades quality more often than not (also depends on format)

Don't forget sometimes expensive if you can't find any free programs to do it with

BTW never saw your first post so maybe it is in the land that time forgot