As far as I know, this type of file should play the same as others. Check what format it is in (avi, mpeg, divx...etc), maybe your DVD or media player does not support the format.
If you download a movie from the internet and you see the letters R5 in the filename you can be assured of a very good image quality. The movie quality will generally be the same as that of a DVD screener, but it will not have the scrolling text and mono-cut scenes that are found in screener releases.
DVD Region 5 was the former Soviet Union - hence the name R5 - short for , you guessed it Region 5. This region is still the place where many of todays hot releases originate and are quickly distributed around the Internet.
In some cases, movies are obtained from non-english speaking countries, and therefore are released with a foreign sound track, meaning that the audio has to be replaced before distribution. This is what "line" refers to.
