Ok, so let me expain my situation a little more.
I'm currently working part-time and since I'm partner with youtube (have the option to run ads in my videos) I was threating youtube as a second "job". Also since few weeks I'm a blogger on gaming portal. So my "gaming journalist career" is growing and I am hoping to quit regular job and try to get more profits out of youtube/blogs.
I was interested a lot in Civilization games because I love the playstyle of them (+ I think Alpha Centauri is one of the best games ever) and love the comunity (which is mentioned in vid). I am aware that there is a lot of Civ vids on youtube, the people you mentioned (Madjinn, Wainy, and Bibor) are great, I agree 100% with that but they are doing playthrought videos. Nothing wrong with that aside of fact they are extremly long. So my idea was to be more focused about mods review, discussion about patches, etc. (rather shorter videos).
But after getting respond of 2K Games I was disappointed. As youtube partner I need permission of game publisher to use their content in my videos, otherwise they can sue me. And if I will make videos that are not allowed to have adds I might have my youtube partner rights removed. So basicly to make videos about Civ games I would have to make another channel. On top of that Civ vids take a looong time to make and that's whats scares me as it wouldn't be much profitable for me. (I know how it sounds, but I barely have spare time for other things then blogging, making videos, working, having a little pesonal life.
@nokmirt I'm not selling their stuff, just putting adds over it

They lose nothing when I'm doing so. As you will still play Civilization no matter if I make 1000 vids about this game. But if you don't have this game and you watch any Civ video you might be like: you know what? I like, it is interesting, maybe I'll buy this game... So it's a win, win situation. That's why I don't understant their decisions.
Take expample of Blizzard as succesful company. You might hate them, but you might not say they are not selling millions of copies of their games. (Blizzard allows anyone to put ads on youtube or other channels over their content) They understand it's free promotion, and their game is more popular that way. Also people are still buying all of their games because of modding scenes for every title. It is same reason why Civ 4 was so succesful (great modding scene, people were buying Civ 4 just to play awesome mods). Now have a look how limited is modding for Civ 5? Why is it limited? Because 2K doesn't allow that? Why they don't allow that? Because fans can make better Civilizations/content then 2K could ergo noone would buy DLC and where would be profit for them?
@forty2j I'll make transcript for you and for everyone that couldn't understand me.

I'll post here info when it will be done.
@eris Some major companies allows that (like Blizzard) also I have personal permission from some indie developers to do reviews/ playthroughts of their games. They do understand it's free publicity. They were even kind enought to help me with some advices, additional info about games, etc.
If I forgot to explain something, please ask it again ^^
Sorry about long post, and sorry about english mistakes.