Quote Originally Posted by AthenaOfDelphi
For anyone who may have been pondering this one (a quick post to say what was wrong would help others)... the problem was content encoding
Yes indeed. I used TIdCompressorZLibEx to decode the data. My little brother (who is not a programmer) suggested me, that the data is encrypted a look for something to decrypt it. :lol:

Anyway, thank you for your interest! Next time I'll write a few words about the solution.