Thanks to pikachuchu at unfiction for pointing this out (check her blog out: hellboyfilm.over-blog.com);
A video response to Lexi Lloyd's vlog about dreams and doors features something very strange:
Notice the numbers in the top left of the footage: 07-01-89
Rearranging these numbers gives you 1-89-7 aka the third The Secret Device code. What you are given then is very interesting, and if it's a clue it's much less explicit than the previous two codes. The only information I could glean from it is the Panatrog logo, and the name 'Cave Beserker'.
The panatrog.org website has three password entry boxes, respectively, each box fits 4,9 and 7 letters/numbers. Now, this might be just coincidence, but Cave (4) and Beserker (9) fit the first two boxes very nicely.
That still doesn't help us much, since a third word is missing, but let's keep looking...