Guild Wars 2

Hey everyone! I was wondering I made this video
http://www.youtube.com/watch?v=c_aM_tQdaJM
and youtube won’t monetize it. I have a lets play series which they have monetized but this guild claiming guide for some reason is against youtube rules. Is there some sort of written permission, terms of use or something else I need to show them to get this monetized. My dream is to become a huge youtuber and it seems I have hit an obstacle. If a dev can help me that would be perfect if a player can help me then please do so. If you want watch the video and tell me if I said something that shouldn’t have been said. This video is monetized so let me know what the difference between the 2 is.
http://www.youtube.com/watch?v=KwxEZEkNFk8&list=PL7MGt5HUw6BN1IxWkSWSP6m_7q4KJV7X1&index=1
heres another
http://www.youtube.com/watch?v=948LgAT2NOQ
and yet another that is monetized
http://www.youtube.com/watch?v=78K3-tmK0II
Please help

music and content that belong to someone other than you perhaps…..