Android: open the YouTube video that you want to display with Beam. Press on the share button on the top right of your screen (the symbol is an arrow pointed to the right). Finally, tap the Beam Remote. Now you can share your video with Beam.
iOS: You have to use the function called ‘Airplay’ to display the videos to your Beam. In the AirPlay menu select AirReceiver (Beam-v1).
Please note that you can also watch YouTube videos directly with the preinstalled YouTube app on Beam!