Nothing too concise, I am afraid. I think your best chance is to focus on a specific question that interests you. I will give you an answer in relation to some specific variables I did a deep dive on:
Video games and short term aggression: Enough findings for me to prefer giving my (not currently existing) children something to do that are not video games if possible, lest they learn unnecessarily aggressive behavior just by copying. However, probably not a mortal danger.
Video games and (adult/teen) addiction: Seems incredibly hard to track on a long-term base, as other people in this thread mention. Nothing is easier to color a bit to your liking than a meta analysis with small effect sizes, if you should be so inclined. On the other hand, good arguments can be made that excessive gaming behavior is very, very similar to excessive alcohol consumption, gambling or smoking - in regards to brain chemistry, slow drifting decline of societal function or even excuses made to the self. Thus, personally I treat gaming with the same seriousness as other potentially addictive things.
Hope that helps a bit, and good luck on your research journey. Maybe you even find some wider spanning reviews that are new, we live in a good era of terminating twenty-year studies :)