At Timestamp 2:00 we copy your domain with period to transfer over. You don’t need to do this. Hostgator already has this information in the TXT section.
Don’t close your OHWO webpage after this point until your domain is completely verified or bad things will happen.
It can take up to 48 hours for your domain to propagate with the new records. Be patient but keep this OHWO page open until the Verify DNS records button works for you.