In the video it states:
In a subnet CIDR block of 10.0.0.0/16:
10.0.0.255 is the broadcast
But that’s the broadcast for 10.0.0.0/24, and 10.0.255.255 is the broadcast address for 10.0.0.0/16.
Its a small error, possibly a typo, and doesn’t matter too much as broadcast isn’t supported in VPCs, but thought I’d give you a heads up.
Just getting ready to report the same thing but see it was reported 1 year ago..