The guidelines are for curation purposes and as such won't be shared in public. We might write up some info/advice in the future though. Honestly though, the biggest thing here is just to write your own, original content.

In my case I do watch videos about the games I am interested in only to confirm if I like the gameplay.

Well, that does sound like a good use for watching videos! I might even utilize them for exactly that purpose in the future :-)