My statement on sampled audio size, was not to criticize the demo or if it's real time or not .
Its just for pointing the fact that if you want quality samples, you must spend a big bunch of ROM, nothing else .

It's obvius that OD2 use some big prerender tables in ROM, you cannot do complex math like sin,cos,tan in realtime,but the display construction is,and i don't think that all the GFX+code take 4.8 Mbytes,but for me the essential is that OD2 rocks and is very enjoyable with the good spirit of demoscene in it ..
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EDIT: I'm going by what other people said. I have not personally verified that nu was prerendered.
The coder (ferris) did not deny that fact,so i think all was really a simple FMV.