Wolter Glebocki
Wolter Glebocki voted up Soul Fly's answer
Why am I getting " You're using an older version of Internet Explorer that we'll soon stop supporting. Please update your browser to the latest version." when using YouTube?I am not even running a windows box.

IE is no longer supported by Microsoft since Jan. 12, 2016

This means that there will no longer be security patches for plugins which creates a security risk. Honestly, the only browsers you should be using are Chrome and Firefox.

Wolter Glebocki
Wolter Glebocki voted up Rooster Cogburn's answer
Why am I getting " You're using an older version of Internet Explorer that we'll soon stop supporting. Please update your browser to the latest version." when using YouTube?I am not even running a windows box.

Quite a bit of You Tube videos run through I E. Why ? I don't know but lot's of them do! All Internet Explorer browsers except IE11 will be going away. Even though you don't use it, You Tube does.