In your last bullet on the slide at 1:50 you specify a /8 CIDR block. You show 192.168.1.1/8. This should be written as 192.0.0.0/8. Normally you would not specify an address within a CIDR block other than the first address. The same point applies to bullet 3 where you specify 192.168.1.1/24. This should be 192.168.1.0/24.