Once the 'film' challenge is completed, the next clue appears to find the Jade Key.
The captain conceals the Jade Key
in a dwelling long neglected
But you can only blow the whistle
once the trophies are all collected
The player must find the correct 'dwelling long neglected', once the player has found and returned all 19 of Zork's treasures[...]
Jade Key Archives
The longer you look, the clearer the illusion becomes.
Check 'em out:
The Copper Key poster
The Jade Key poster
The Crystal Key poster
These are an extremely limited print run of 4,000 and are only available to guests at the Ready Player One VR experience set up at South by Southwest (SXSW), where the film had its world premiere last night.
Early[...]