Upgrade your browser
Surfing the web on an old browser can be a lot like running a steam engine along the tracks of a bullet train--it may still work, but it doesn't take advantage of the speed and security of the new technology.
If you’re not using the most up-to-date version of your browser, you’ll still be able to watch YouTube videos, but you may have problems using YouTube’s newer features. Learn more about web browsers and check what version you're currently using at WhatBrowser.org.
For instructions on how to upgrade, visit your browser's help resources: