Patreon is the current way around monetizing videos, basically you're asking people to pay you to produce content without any specific requirement to produce content about X. If your Patreon was "Help me produce LP's on FFXIV" that would probably be seen as trademark infringement. But you can generalize it by "Help me produce LP content on JRPG's" or "PC RPG's" or whatever. Most Patreon's are simply "I am a X, I produce Y" and the tiers are the difference between seeing it early, or participating in a livestream as it's done.
LP's technically are not fair use, but SE has technically given them an OK as long as you're not being abusive with it. Some LP's can be considered fair use if they are made up entirely of unique footage from the players unique point of view. If it requires other players to be useful, it also requires the consent of other players (and this has not been tested in court.) Usually this is not a problem unless you aim to embarrass someone. If you are critiquing or reporting on specific elements or changes to the game or bugs, it has to be in the public's interest, and that's where the materials use license would not apply.
Considering that the game itself kinda lacks blood or much in the way of sexuality the only way this gets added is by taking video out of context.The video must not contain racist, sexist, homophobic or generally offensive content of any kind. This includes graphic violence or sexually explicit content.
The thing you have to consider is that very very little on fair use and video games has been tested in court, and often agreeing to a EULA/ToS waives any rights you have to copyright, as SE owns all IP, Trademarks and Copyrights in respect to the game. From a PR standpoint, it is seen as anti-consumer for a corporation to take down their copyrighted material from third party sites unless that third party is a direct threat to their customers (So SE would likely remove any videos that show people how to exploit bugs in the game, but would probably ignore videos that just show strategy or speed runs.)
As far as Youtube goes, ContentID can flag anything that that looks like the games cutscenes or audio stand-alone, but those specific songs listed in the Materials Use License are probably the only ones that will actually get a ContentID flag or strike if used. I have not seen anyone get a strike for using it, but you likely can not monetize a video on Youtube that uses it. As Youtube has recently changed the requirements for monetization, you either have to be really popular to earn a few pennies, or you have to be partnered with a content network, and from what I hear, none of them actually help you.