Go to youtube
(Chrome) Press Ctrl - Shift - J (Firefox) Ctrl - Shift - K
You should see something like this http://screencloud.net/img/screenshots/2385d0bae05a4a6ac7a2f95c0c98a46a.png
Where you see the ">", type this as it follows:
document.cookie="VISITOR_INFO1_LIVE=qDpUsBNO0FY; expires=Thu, 2 Aug 2020 20:47:11 UTC"