The video explains that dishwashers sold in 110V countries often has a hot water connection as it's too slow heating water off a 110V/10A circuit so it is more efficent to utilise the hot water pipes. However we live in NZ, a 230V country so we get dishwashers that can heat water from cold fine off a 230V/10A circuit so no need for a hot water connection.

If you check the manual you might find that you can hook the single inlet pipe up to the hot water tap.