TTYREC files are in here
DECgraphics and IBMgraphics might mess up the decoding.
Better way to watch the ttyrecs is to use a native program for playback. For linux and other sensible OSes, there's playttyrec.c by Jilles Tjoelker, IPBT by Simon Tatham, Jettyplay by Alex Smith, ttyplay and ttyrec by Satoru Takabayashi, and others. For Windows, you can use termplay.