I can play the 25GB MKV file just fine in VLC. It’s the M2TS file that won’t play for whatever reason. Menus and everything work. All other titles/m2ts streams. Just that one will not work. The menus didn’t work at first, but I discovered that function was just turned off in VLC and after enabling it it worked fine.

My laptop does not have a GPU. Not a good one, anyway. Just an onboard Intel HD 3D accelerator (aka crap). I will give it another try on my main rig at home as a mounted ISO and see if I have better luck.