Deep Fear is really, really cheap when it comes to imports, and all of the voice acting is in english. I've only played it for an hour or so, and I don't remember exactly the quality of the FMV.. all I can say is that the VA was surely made for drinking games.
Unfortunately, most of the Saturn's best FMV, like the Sega CD, was run in small boxes that only took up a small portion of the screen. Each of the Panzer Dragoon games, especially with Part II and Saga, were like this.. Regardless, they were still nice to watch.
I enjoyed the FMV in Lunacy. Not the absolute cleanest, but on the other hand, it's full-screen. Come to think of it, the FMV quality in Solar Eclipse was pretty good, actually, full-screen and all--probably better than most Saturn games, especially considering it was an earlier title on the system.