To block websites on ALL your devices you need to block them on the router level. If you have a linksys router you can visit http://192.168.1.1 http://192.168.

To block websites on ALL your devices you need to block them on the router level. If you have a linksys router you can visit http://192.168.1.1 http://192.168.1.1 and the default username and password are both "admin". From there you can visit the website restrictions area and add YouTube to be 1 of 4 restricted domains.