Yep... this is like the classic calling in bomb threats to schools, just a lot more expensive in terms of manpower needed to clear it and disruption to the port operations.
Since the threat came via YouTube, I would think the Feds should be able to track down its source... at least if it came from within the US.
The abcnews4 link specifically cites George Webb’s youtube video. He appears in his video. He won’t be hard to locate.
Yeah, you need to balance out the need for shakedown operations with discouraging too many false alarms.