1. Go to the Twinkle Twinkle Little Star video
2. Just under the video screen click the "Add to" button
3. Then click "New playlist"
4. Name new playlist "Nursery rhymes" or similar
5. Click on your name at the top of the screen, You will then see your favourites and any playlists you created. Click "view details" on the newly created one
6. Make sure "autoplay" is switched on (it's default setting is usually off)
that's it. So for future plays/repeats all you need to do is go to point 5 and in a couple of clicks you'll be auto replaying the video and can get on with other things whilst your toddler watches and enjoys!