Do you ever wonder if the society changes the older issues of the WT to say what they want it to say on those DVDs? Like the 2012 version might say something different than the 2015 version in the 1975 WT?
It certainly seems like the sort of thing they might do, but the only case I'm aware of is the one shown by previous posters in this thread from the 1989 WT, where "in our 20th century" was changed to "in our day." In that case, the text was changed in the printed bound volume from what appeared in the original magazine, and the bound volumes are what are supposedly collected onto the CD-ROM (indeed, there were no Watchtower CD-ROMs in 1989 when that change was made). I'd be very interested if anyone could cite examples of any other such changes between the original printed magazines (or other publications), the bound volumes and the WTLib CD.