Example post said:
Example picture
SHA1 of the film in question's IMDB url (example URL "http://www.imdb.com/title/tt0092106/" although without quotes when you do it)
f5ea710126f02da1081d291d27895f2829091391
Sha1 generator
http://gtools.org/tool/sha1-hash-generator/
The number is there so you can tell if you got it right. The number there
"f5ea710126f02da1081d291d27895f2829091391" is used for it.
It is the SHA1 hash (it can be used for many things but here we are using the property that you can turn data into a hash but not a hash into the original data) of the IMDB url (
http://www.imdb.com/title/tt0056172/ in this case).
Simply get the IMDB url (I hope there are no encoding issues here) you think is correct and drop it in
http://gtools.org/tool/sha1-hash-generator/ or any other SHA1 hashing tool, if it pops out correctly and it will be exact or not at all (even a slight change will change the hash dramatically) you got the right film. Saves the person who posted or the person from the previous post from having to be there (time zones are very much an issue with this game) and allows the game to carry on.
Others wishing to do it do make sure to use SHA1 or something more exotic (or if you know what it is salt the original data and tell us the salt value)- several sites seem to have MD5 hashes of IMDB URLs as we unfortunately discovered in one of the earlier rounds of this game.