I have a laptop which I have been using for years. I was always able to watch Youtube videos and hours-long HD videos stored on my hard drive just fine. However, recently the device started poorly performing whenever I play any video. The video playback starts smooth but after 5~10 minutes it starts "cutting" and if I let it continue it freezes the machine. I tried looking at resources and noticed the CPU usage starts off normal (around 4%) but after 10 minutes or so whatever program I am using to play the video (be it
mplayer, etc) suddenly increases to something like 50%. Even when I watch a Youtube video the Web Content process goes around 40% after a few minutes of playing.
I tried playing videos with Debian, Windows and while live-booting from a Debian usb installation, all gave the same exact result. And this never happened before on any of them.
My guess is that some hardware component started having issues. I don't know how to debug this problem.