The reason it was so funny is because this guy rips all kinds of stuff apart, and you can tell in the video that he was literally scared of this thing!

haha needs no discussion, the sound is added over the video....or he has a pedal that he pushes to start another shredder close by.

Once the shredder is open this is obvious. The sound appears, but the cogs dont move

Easily done Nothing paranormal, alien or anything else. Just someone yanking your chain

The gears are not moving..... witch means he probably has another shreader

Yeah I do see that he could have been posting it to get attention on his channel, but I think it was hilarious anyhow. The weird thing is that when he touched it it would go off. I noticed it didn't happen every time, so probably not anything paranormal, but still a good laugh.

I looked in the comments below the video, and apparently it is special fx according to the guy who posted it:

@Deock76 ....LMAO...That is the reaction i was looking for. Have to give it up for special effects.....Peace lmvelazquez100 3 weeks ago

A guy with a drill behind the camera does the sound effects.

Bravo - Sierra.

Read the comments on YouTube. He admits it's special effects.