It is lacking in information, indeed, because such "researches" are spontaneous and are taken from a very narrow perspective. What he says applies to ANY form of gaming, not only video-gaming. A game presents you with a goal that you must reach in accordance with the game's rules. To do that, you must make various decisions ranging from very basic to very complex during the course of the game. And making right decisions makes you feel pleasure, of course. No one would play chess or football if it gave you no pleasure when you do it right. When you gain positional advantage because you've found a not so obvious tactical opportunity or when you split the defence with a tricky pass that goes directly to your teammate who then scores - yeah, it is pleasure. When you gib someone with an airrocket because you predicted his movement - it's a great pleasure, too
. It's a pleasure to outsmart your opponent, to do something unordinary but rewarding, e.t.c. Again, it's about GAMES, not just video games.
Yes, one can become addicted to gaming, but roots of such a problem do not lie in gaming itself. Gaming is just another form of escapism. We all know that life can be a bitch and is not exactly always full of good things. Actually, it never is. Especially nowadays, when there are so many of us around the globe. Cities became like hives with millions of faceless strangers rushing everywhere not giving a damn about anyone, but themselves. It may sound too philosophic and removed from subject, but all is connected. Consider the eastern countries like China, where some of the most heavy cases of addiction took place. That is why you can't go ranting about dopamine or whatever and conclude "gaming is bad, mkay ?". Some people read books or listen to music to escape from other things. If one constantly prefers gaming over speaking with his friends, his friends are probably not that friendly or he's not such a big friend to them himself. You make analogies.
Also, brain becomes addicted to gaming because games challenge your brain. Walking with your dog doesn't. And so on...
As far as I'm concerned, all "researches" about how video-gaming affects your brain are seldom creditable and are in 99% of cases a completely useless waste of time and money. The guy didn't say anything new, you don't have to know how it works on a chemistry level to have a general idea why people spend so much time... gibbing others