Adds buttons to filter out videos by type and/or status. The toggles can be hidden/shown at any time by pressing the button added to the header.
< Feedback on YouTube - Toggle videos buttons
What URL are you accessing YouTube from?
As far as I know it should always be https://www.youtube.com, regardless of country and locale.
But if it does not work for you there might be others.
Also, are you sure the extension and the script are both enabled?
Doesn't work in anything Chrome. Tamper monkey nor violent monkey. Button doesn't show