My Samung Galaxy S3 started vibrating like a week ago, only when I'm on the Youtube app, it vibrates with the noise of the videos I watch. It is very annoying, I also believe it's draining my battery. And it makes the app VERY laggy. I tried taking it off 720 definition thinking it was my slow internet but nope it's even laggy in 240. Haptic feedback is turned off every vibration is turned off, all apps are deleted except the ones that the phone wont let me delete. I'm very frustrated please help.