Editor’s Note: Sign up for Unlocking the World, CNN Travel’s weekly newsletter. Get news about destinations opening, inspiration for future adventures, plus the latest in aviation, food and drink, where to stay and other travel developments. CNN  —  This week in our travel roundup: New footage of the Titanic revealed for the first time, the medieval treasure trove found under the streets of Amsterdam and the Air New Zealand flight that went on a 16-hour round trip from Auckland to Auckland. Video footage showing the wreck of the Titanic just months after its discovery in 1985 has been released for the first time. The 80-minute movie, unveiled to coincide with…