Hi Vincenza Rothenberg. Welcome to Grokker! Once you have an account with Grokker, you are welcome to watch our videos on our website of grokker.com, through our Android or iOS app (you may download the app from either Google Play or the App Store). You may also watch our videos on your TV using Apple TV, Roku, Amazon Firestick, or Chromecast. If you need help with any of these options, please feel free to reach us at support@grokker.com and we would be happy to give you specific directions.