From what I hear, Mike Caldwell pronounces it "ka-say-cious", where the last "cious" sounds similar to the "cious" in "delicious".
No probs, original YouTube version was down, but I remembered I had it somewhere in my basement among other treasures. If you want to thank me you can send me some Merit, maybe I'll be able to put my own avatar some day =).
I also have another short one, called "Making Casascius coins" where Mike is putting holos on newly produced coins (without commentary). I will put it on the channel as well, but BitTube complains something about a format so I will need to run it though a converter first.
I re-posted the video link on a new thread as I expect it will be of interest to folks not following this thread.
if I had any merit I'd send it your way!
Would love to see the other video if you can share it.