Felt bored, sifted through the Daedric text in the video to see if there's anything interesting.
The text http://www.youtube.com/watch?feature=player_detailpage&v=DlJOPoXUiko#t=52s reads (going clockwise, starting at the top left) "MOLAG BAL | MOLAG BAL | MOL[K?] NARBON | MOL[K?] NARBON"
There is quite a bit of text in http://www.youtube.com/watch?feature=player_detailpage&v=DlJOPoXUiko#t=105s interesting little room. (Black soul gems!) The glowing blue text, similar to the text in the last example, reads, "MOLAG BAL | MOLAG BAL"
The slanted text to the left appears to be gibberish. "CP[U?]BW"
The four-letter snippets of text dividing the soul gems appear to read, "U?O? | LFSP"
And then there are the tablets http://www.youtube.com/watch?feature=player_detailpage&v=DlJOPoXUiko#t=58s, with a clearer view of some of themhttp://www.youtube.com/watch?feature=player_detailpage&v=DlJOPoXUiko#t=108s.
The tablet to the right appears to read, "ABC[D?] [?/_]IJK OPQR"
As was mentioned earlier in the thread, the glowing text reads, "NIRN OBEYS COLDHARBOUR NIRN OBEYS COLDHARBOUR NIRN OBEYS" The two lines of four letter text below that block seem to read, "CAJL CAJL"
The top line of the little pedestal below that reads, "QUK ???" (I couldn't read the bottom line.)
So if any of you are interested in arguing over some of those or staring at the ones I couldn't discern, feel free. For example, some of the U's earlier on probably weren't U's, but U's were the closest thing I could find to compare. The U in QUK is certainly a U.
So, NIRN OBEYS COLDHARBOUR, MOLAG BAL, and GIBBERISH GIBBERISH.