Paradox is only the publisher of PoE. I have however seen quite a few people doing youtube videos on it so it should not be a problem to do so.
However with your relativ low view count (200.000) I doubt you will ever see any youtube money, since you as I remember need to earn at least X money/month to actually get them. Think this X = 100$ but I'm not sure.
cool.
I have monitized other videos, my unprofessional reviews for example and some how to's minecraft modding and some other stuff, though i always disable the adverts that appear for 5 seconds before the vid (i find those aweful and wont inflict them on my viewers, in the same way i dont inflict 20 to 30 second intro graphics on my viewers, always straight into the vid)
The limit untill a pay out is £60 after a mere 4 or 5 years of monitizing the odd video im already up to £49.13 ! so any year now i should get a pay out ! basically if its ok to monetize them then i really should, it is not why i do the videos but that £60 when it comes will make a huge difference to that months budget (us security guards get very low wages)
some comparisions :
as a mod developer for minecraft, my now too out of date mod was downloaded 1200 times (i want to say 1262 if memory serves but cant remember exactly) : amount made in donations : £0
my windows phone app Rpg app (1st edition) 127 downloads : amount made in donations : £0
The sequel to above (for windows phones AND windows 8.1+ store) 53 downloads(phone side only cant see desktop side downloads at mo) : amount made in donations : £0
(for those that want to know about the apps
http://forums.windowscentral.com/app-spotlight/353188-rpg-app-mr-g-reaper-thread.html )
So im counting the £49.13 as a great win even if its taken years, doesnt cover the cost of my elgato+broadcast quality mic (that my cat promptly made semi broadcast quality by pushing it off the table) and fees for xsplit when i started (i now use obs)
Sadly in the world of video game videos it seems you either need to get the games really early (with permission of the developer to show the footage...ie partnership), be on certain whitelisted minecraft servers or be very very deeply charismatic to do it as anything more then a hobby