Its a good video with a good point, but I also feel like he might have misunderstood the original post (or maybe it's too vaguely stated).
It read to me like saying, if you're a loser, you're surely a gamer because loser, scumbags etc, are always gamers. Now this is obviously false too, as some kind of absolute statement. But the example that's listed straight up says a well-adjusted adult playing for an hour after work is a possibility. So the guy that made the video seems to fall into that first category, and therefore isn't a part of what the post was even saying. I suppose that's a minor point.
That said. The video stands alone on its own. But I think people that use video games as "achievements" instead of actually doing something with their own lives have a problem. But same goes for people who watch too much tv, follow sports religiously, etc etc. Games can be good or bad, depending on how you use them, just like so many other things in life.