The older DVD format was fine, the HD movies only play on a computer now and appear to be hosted in a Director file.
Director is notorious for not playing well with large format Quicktime files, which these HD movies actually are as H264 Quicktimes.
I’ve been buying TT products since they were on VHS but this new series seriously sucks. I won’t be buying any more training in this format.
The resolution increase to HD is not worth the performance hit, I have a G5 Quad with 4 GB of RAM and an Athlon 64 X2, both run these disks poorly when anything else is running.