So far, I have located the following train-sim videos from youtube, as follows:

Syounan-Shinjuku line
http://www.youtube.com/watch?v=EMN3h5Pr_O8

Twilight Express (EF81 loco)
http://www.youtube.com/watch?v=177K7Ss_KHQ

Nagasaki Line (TYPE817)
http://www.youtube.com/watch?v=zclC-2eeF-s

Kosei Line (TYPE113)
http://www.youtube.com/watch?v=C---duCOZWY

JNR Sagami Line
http://www.youtube.com/watch?v=nVGgTT2UJ0U

http://www.youtube.com/watch?v=NNXUBVMEfiY

Kanto Railway Jousou Line
http://www.youtube.com/watch?v=jRW2sXMleQE

Gakunan Railway
http://www.youtube.com/watch?v=LdUTUvI21hY

Tobu Noda Line
http://www.youtube.com/watch?v=bhKVL14ytM4

Tobu Isesaki Line
http://www.youtube.com/watch?v=fodBxXDa91E

JR Kyoto-Kosei Line (approaching Kyoto)
http://www.youtube.com/watch?v=dHPnGuAWVec

Tokyu Toyoko Line
http://www.youtube.com/watch?v=JEGuP5fFqRw

Tokyu Setagaya Line
http://www.youtube.com/watch?v=vb8_mUg5R8M

Hokusou Line
http://www.youtube.com/watch?v=qi76QmtFXtQ

Hakone Tozan Railway
http://www.youtube.com/watch?v=hKoiElk58jM

Hanshin Railway Main Line
http://www.youtube.com/watch?v=XSURW2BiQ00

JR Senseki Line
http://www.youtube.com/watch?v=F2tLHw0TQzw

JR Negishi Line
http://www.youtube.com/watch?v=LFJb4p_3ziE

Hankyu Kobe Line
http://www.youtube.com/watch?v=mdaf7tOiAFY

JR Iida Line
http://www.youtube.com/watch?v=--zayGvr1JY

Meitetsu Tanigumi Line
http://www.youtube.com/watch?v=wvUBkinbJNI

UK Birmingham - City South
http://www.youtube.com/watch?v=B0npmzj9D4w

JR Narita Line
http://www.youtube.com/watch?v=QbFUii7DT6c

JR Togane Line
http://www.youtube.com/watch?v=lbLSs2NlT0c

JR Keiyo Line
http://www.youtube.com/watch?v=dYtCCY01CnQ

JR Gono Line
http://www.youtube.com/watch?v=9Q7g8kJKkWI
(train in the snow, cool man!!!)

JR Tsurumi Line
http://www.youtube.com/watch?v=hoIFsTC2tDs

Odakyu Tama Line
http://www.youtube.com/watch?v=M5TvnQgm9YM

Kintetsu Nara Line
http://www.youtube.com/watch?v=fMDsnk30qwY

Kintetsu Osaka Line
http://www.youtube.com/watch?v=cnv7xTc5EYc

more to come..... Very Happy