How to limit cellular data use?

How can I use Norton products (probably Norton Family) to limit the amount of cellular data my kids use?
  If left alone the kids will burn our 5GB data plan in an afternoon.  I like them having a data plan so they are easier to contact using imessage and they can use the phones to their full extent. 

Can I simply block all video streaming when on cellular?  

Can I block video streaming automatically once it hits 1GB each month?

Thank you.