#1 : See the video and watch it frame by frame : you will see this clue in the video
#2 : in there is a word " Charlie and The CHOCOLATE FACTORY " so first you go to map Factory and there is also another word " CHOCOLATE " so go to a Building his color is same as a " chocolate color " There is only two there check them ... Finally you will found a number there .... ( 166887 )
#3 : if you look good you will see that the number is located in " up right " the building . so you will go to any topic in the forum and open it it doesn't care which forum you open ( ru.tank... or en.ta )
after that you will change only the number in the " up right " the page ... to ( 166887 ) the link to the topic : http://en.tankiforum.com/index.php?showtopic=166887
#4 : click " ENTER " and you will open the topic and in the topic there is a link ( the game ) and we are playing ( the game ) so open it ... the link to the picture : http://savepic.net/4179724.jpg
#5 : you will see a picture and there is a number with ( the game ) logo and the number is ( 1 ) and we are playing in the first game .
#6 : the picture is in map 2042 so i think that the answer is ( 2042 )
i hope that i win :)