Communication with Television

My son was watching YouTube on his iPad and I asked him could we watch it together. He replies yes mama. I asked what were we watching and he said play-dough its cool. I asked him can we turn the volume down because I’m doing a homework assignment he said yes. We sat on the couch and watch the video with the volume off. The lady and gentleman in the video was moving the play dough around and moving their hands. Of course they were talking but the volume was off. I thought to myself they giving the instructions on how to create different things with play dough. Alter monitoring without the volume, my son turned the volume up. The first thing we heard was the lady giving instructions how to make cartoon characters out of play-dough and showing different tricks switch their hand. As they continue to show tricks they will name each trick they are showing.. Before listening to them I thought they was just playing around in the play-dough and talking about when colors mixed what color you get? But my assumption was totally wrong and off.