Many are diagnosed with “mild” autism, like my cousin, who just need to step away from the video games.
Maybe he will outgrow it. I have a relative in a similar situation - he was constantly carrying a video game player with him. I was worried that was all he would ever be interested in. But now he is older, doing well in school, and even reading adult-level books about computer programming and he knows a lot about configuring PCs.
I think video games reinforce addictive behavior and maybe this is a worse problem with people who have a high tolerance for repetitive activity. You score some points in a game, you are "rewarded" with playing on a higher level in the game, and so on. Some people get drawn into this and become addicted. I wonder if children who in previous times would build model airplanes, build electronic kits, work with chemistry sets, etc. instead nowadays get caught up in the adictive behavior of video games. Not to demonize games, but I d think too much of that is harmful.