USA Football has a great tool for parents that is free.
It takes 30 - 45 minutes and talks about participation, health and safety, your role as a parent, FAQs . It is self paced, very educational, and done with the emotion that parents can relate too. I would encourage all parents to view portions with their kids. I would even encourage that it be recommended to any parents who are on the fence as I think after viewing it, they would feel better about their child playing, be able to have conversations with their child about playing and also be an advocate for any safety related issues.
Click on see all courses and it is called youth football parents 101.