In Shenmue 1, \SCENE\01\TOKI. That's the folder with the cinematics in Russiya China Shop. There are two sequential data BIN files. "SEQDATA2.BIN" is the one about translating the letter. However. There is also another one, "SEQDATA3.BIN". That is either a leftover (that should better be in another disc), or an old/beta/unused cinematic. When you replace in the MAPINFO.BIN references of SEQDATA2 to SEQDATA3, then it plays that cinematic of the latter. But, it doesn't have motion, voice and subtitles data. It does have lip syncing data, though.
Furthermore, you can see a lot of these lines in BIN files like MAPINFO or SEQDATA, for example:
/p16/prj16m5/AUTH01/01HOK/SE/foot/Akirafoot1a.aiff
/p16/prj16m5/AUTH01/01HOK/SE/cloths2/furimuki_n01.aiff (furimuki = turning around)
This seems like a path [leading to a (Sound Effect) file]. But you can't find anywhere a path like this in the data folder.
There is a "M_01HOK.BIN" file (which part of its prefix is "01HOK", like the one in the path above) in the TOKI folder. It seems is a file about motion data, and you will see references like:
AKI_AT1_KIKU_HOUOUKYOU_HOKKYOKUSEI_0100 (AKI = Ryo, KIKU = ask?, HOUOUKYOU = Phoenix Qiang(?), HOKKYOKUSEI = North star)
SIN_SIN_STAND (SIN is Shenhua)
etc
How these references relate to data of the file, I don't know yet.