The Art Of Repeat

I wonder what makes us like something. I wonder what makes us want to do things.  I wonder this because I sat and watched Owen look at the same portion of a video more than 40 times, with the same actions and then the same reactions. 
He knows how to do so many things on his tablet. I was amazed though at the consistency of how he went through this video. I know my baby likes to repeat things but this was so interesting to watch him because he had to go through so many steps to make the video start and stop and then repeat it in exactly the same way. 
I wonder what it is like for him to see it over and over again. I wonder how this brings him such joy. I suppose it is like when I get my favorite piece of chocolate or get to listen to my favorite song over and over again. I just wonder how it makes him feel. 
I know that repeating things and routine help Owen so much. I keep trying to figure out ways to get this translated into words for him. I have been exploring different apps that are picture related. We tried this with his speech teacher early on but he didn't really take to it. I think now that he is a little older maybe he will like them again, sure worth a try.