It's a Russian DVD release prior to the official Studio release of the DVD. It's an interim format that was created to deter all out bootleg of the DVD release in Russia by telecines. The line means that the Russian audio is substituted with a line in from the English audio. The large movie studios release the DVD early but it isn't full quality yet. So, you get what is a watchable video but it's not the same as a DVD you would buy retail.
Pukka a known member of the pirated community said this about R5:
Over the past 6 months the major movie studios have been releasing retail dvds
early in Russia. They do this to stop the widespread use of pirated telecines
(which were once very common). Lately however there has been very few real
telecines, most of the scene telecines you see are actually R5 retails.
R5 retail is rushed out by the studio, they are basically competing with
pirates, so there is little to no cleanup of the film after the telecine
process. So the main difference between telecines put out by the pirates is
that the r5's are done using pro equipment, professional studios and
professional people. The quality of R5 retail is very similar to dvdscr's,
no time is usually spent cleaning up dvdscrs either.
The range of quality we now have is like this.
R1/2 retail > DVDSCR > R5 Retail > Telecine > Telesync > Cam.
Vhs scr and wps, come around the ts mark (obviously differs between rls).