If you have the normal confluence skin go to videos and just underneath video add-ons, and click here. You should get a list of add-ons just hover over the ones that don't work and press the menu, then on the sub menu press add-on information , this should say where its from and repo to. Then go to system, get add-ons and scroll down and do as I said before. Remember add-ons go down time to time or get blocked or URL changes to. Worth going to Tvaddons.com to see if this is the case.