Obviously you said the first thing is to say what just comes to your head, but maybe since this video is about improving your kd you could think of some tips to talk about on ways to help people improve their kd just like you are. As for the facts, in my opinion if you just threw a random fact in your video I would ask what it has to do with the video. So if you were going to throw in a fact make sure it is close to or has something to do with improving your kd, which is the topic of the video from what I read. You could also maybe talk about your favorite specialists, I believe they are called, to play as and maybe strategies you use with each one that helps you improve as a player. Hopefully some of this helped!!