YouTube is not appropriate for Year 1 children. Even with restrictions turned on and autoplay turned off, much inappropriate content can get through. If you would like your child to access age-appropriate video content safely, we recommend using 'YouTube Kids' and exploring the parental controls within the app (see below). This page is very useful for parents and explains how to use YouTube for Kids:
https://www.youtube.com/kids/parent-resources/
Click here to view some handy guides for parents about safe use of devices.