hmmmmm. Theres 2 ways to look at this, the first is that looks staged. I want you to notice 2 things here. First about 10 seconds in, you see his tower, under the desk. Notice, there are absolutly NO cables attached to it whatsoever. Possibly, there could be another tower somewhere, however, judging by the location of the mouse and my next piece of evidence, I am going to guess this guy is left handed-most people put their towers by their dominant hand (not all but most). But, its the next argument that really ties it in-1 second later, you see little netbook to the left of the monitor, obviously powered up, with cables that, while its hard to tell, looks like it goes to a AV adaptor to the screen. Now, throughout the rest of the video, you catch glimpses of that netbook but never the screen-and it would be easy for the person with the video to manipulate the keyboard and mouse to "create this problem" while holding the camera.
On the other hand, the screen in the one image that does show the netbook is different (they could have changed it) and the tower being used could very well be on the right side of the desk out of view of the camera. I mean, after all, why would someone lie about something like this? I don't know. As for the problem, I would lean towards infection, or maybe hardware problem, but most likely an infection of some sort.
Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit.
Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.
If I don't reply within 24 hours of your reply, feel free to send me a pm.