https://www.youtube.com/watch?v=yAy5nX6VXXo
Not directed at you, Wendy.
I don't think it's funny at all....it seems very violent. What is funny about blowing up animals?
It's a part of exploring a different world.
To be fair, it's a little telling that most people are bothered by the dead piggies more than the blown up people in that video. From my perspective, I don't think violent in video games translates at all to violent in real life. The kid in my 6th grade class that shot and killed a neighbor 5th grader kid had zero access to video games (his mom thought they were inappropriate, while most of our grieving town [Molalla OR] in 1986 would have wished that she'd extended that opinion to .22 rifles.) Although it was 1986, and a logging town, so really the combination of "violence and video games" was pretty much restricted to various ways we showed our displeasure with the Atari E.T. game (it was legitimately a piece of garbage.) That one incident probably informs my opinion that it's better to let someone who is truly violent stay inside and play violent video games than encouraging them to go out and interact with real life where they have the potential to commit real world violence.
The appeal for the kids as far as I can tell isn't the action on the screen, it's Pewdiepie's running commentary (basically saying whatever pops into his head) and reactions to the games. More than that though is the world breaking. Once a game is completed as the designers intended, kids (and my husband) love going back through the game to find easter eggs, glitches, world borders (that's where stuff gets a bit weird) and traps (where the character literally cannot die or end the game, but can't progress or escape because of programming errors.) Where the original storyline gave 80-100 hours of game play finding and documenting all the additional stuff can add another 200 hours to the entertainment plus something interesting for the kids (or my husband) to share with their peers over the next few days.
If I saw my kids engaging in a lot of this, I would take them to a psychiatrist pretty quickly.
If it were a sudden behavior I would probably consider it too (although honestly, you're better off taking a child to a licensed clinical social worker, cheaper and they tend to do more in the way of behavioral tactics for children and their parents than the diagnose and prescribe route.) On the other hand I know my kids; and to them repeatedly blowing up of things, throwing chickens (Zelda), shooting the same targets, capturing hundreds of the same creature (Pokemon) and repeating levels over and over is just to them a way to dissect the game. Its weird to me, but to them so much fun.