Warning: slight rant ahead due to hearing people warn others of the "dangers" of video games for far too long. It doesn't seem to apply to the OP, but it is relevant to others.
This basically amounts to the current generation being afraid/disliking that the current ones don't do what you did. That's basically what it comes down to. You would rather they go outside. Instead they want to play video games and talk to people on the internet about video games. you worry it will cause them to be antisocial.
Here is the truth. I've played video games for years. I've been on the internet since I as 13. Are my primary daily social interactions with people on the internet? Other than my co-workers, yes. But I DO have friends that I see weekly, hang out at a bar, or one of their place and play some card games.
The absolute terror that some parents have and feel they need to cut off the "epidemic" that is video games is hilarious to me. I played (and still do play) video games. I watch anime. I also have a job, and pay my own bills and do have offline friends.
In the end, it comes down to people being afraid/disliking that which they don't understand. you don't like video games, you don't understand why they wish to play them/watch youtube videos about them? Fine. You are free to dislike them all you wish. But I don't like people who insist on forcing their likes/dislikes on their children. Who knows? Maybe your kid will grow up to work for a game developer as a programmer.
Case in point, the people I know on the internet and interact with daily, are as a whole more intelligent than 95% of the people know offline. People who play video games have better reaction times and snap recognition than people who do not. Why don't people stop trying to stifle their kids interests. Limiting the time they spend on something? Sure. I can understand that and it makes sense. But trying to discourage it entirely? Or being worried about it to the point of making a thread online about it? Just remember, you were a kid once, doing things your parents probably didn't understand/like either.
tl;dr, video games aren't going to ruin your kid. If he's a good kid, video games won't change that. That's just what he/she's interested in.