The screen shots from that video are pretty amazing. I had no idea that Steve Jackson and Al Gore were doing promo for TTi.
As for the finiacial viability of the thing, I don't recall what CDROMs cost back then because I couldn't afford one, even though I had the Duo, the most expensive game system.
I knew a guy with a CDROM version of Manhole in...I want to say 1988, the drive was about a grand then, I think.
Consider all those PC98x and x68k games on PCE. Advanced VG, Ys, whatever, they were almost always ported from floppy versions which is partially why the PCE versions were more lavish with anime cinemas, extra characters, etc.
I think the first version of Windows to sell on CDROM was Windows 95, and even then not at first, IIRC. CDROM wasn't a format full of killer apps at the time, but 1992 was very close to the transition. I think those Perfoma Macs with CDROMs in them were...what, 1993? So it was getting there.