Load the file Torment.ini in a normal editor and search for the
 [Movies] section. To make all movies viewable edit it like this:

[Movies]
BISLOGO=1
TSRLOGO=1
OPENING=1
SS_MSLAB=1
SIGIL=1
TIME=1
SS_PHARD=1
SS_ADETH=1
ALYBIRTH=1
DEATH=1
MAZE1=1
CURSTD=1
OUTLANDS=1
BAATOR=1
CARCERI=1
CRETURN=1
FORTRESS=1
FORTDOOR=1
ARRV_IGN=1
T1ENTER=1
T1ABSORB=1
FINALE=1
CONFLAG=1
T1DEATH=1
CANNON=1
RUNE=1
DRAGON=1
MAZE2=1
ARRV_VHA=1