Just wanted to share one of my tests with generating privkeys in wallet import format (wif).
I took the SHA-256 (HEX) checksum from the files on the /contest/ page and generated an importable privKey (wif).
But..... nothing - balance is staying at 0.00000 

===25BTX_ori.png===================================================
privKey (sha256hex): d25d6ba93e59aa5bb124b2ec72a59b8425cd0d502f58f4f5f2f09751c4d80ac3
wif: L4Gdf1NLPBtMrDHEhYzdSVehU3MmLugkG5oRKyEht1oogUpxgKnr
validity (wif): 1

===lto.mp3===================================================
privKey (sha256hex): 587e75b6c54a5b81c8b0b638beb7351c627f2c8aac18ba09f421f9d4348c9322
wif: KzBjPRpTTRXZLYfwvhXCM5BKWGYQ7EhneP8rcvNob6K3xMYUpiRA
validity (wif): 1

===looney_tunes_opening3.mp3===================================================
privKey (sha256hex): 587e75b6c54a5b81c8b0b638beb7351c627f2c8aac18ba09f421f9d4348c9322
wif: KzBjPRpTTRXZLYfwvhXCM5BKWGYQ7EhneP8rcvNob6K3xMYUpiRA
validity (wif): 1

I'm out - no more clues.
Greets, Ebo