marking this as solved (https://community.nodebb.org/topic/1332/youtube-embed-not-working#9734)
NodeBB not working with DFP synchronous rendering
Title says it all. For some reason NodeBB doesn't works with synchronous DFP code with synchronous rendering.
I already contacted Google DFP support and they couldn't really help with it. I think that this bug should be definitely noticed as montization is a major point for webmasters.
I am running the adsence plugin only because there are so much trouble with DFP and NodeBB