How can video games or tv harm you

Well, after a long while playing video games, typically my thumbs feel like they're going to break off, my butt may hurt and my eyes water up approximately every three seconds, causing temporary blindness. Gaming can also cause insomnia, geekiness, lethargy, apathy, loss of significant other due to frustration and neglect, death from starvation or dehydration due to personal neglect, body odor for similar reasons ... it's a long list.

Also I guess if you suffer from epilepsy it may cause seizures.

But mainly the other stuff.