Almost nobody will ever sleep under the sea, so this video is the only way in. The porthole shot makes you feel sealed in with him. The depth number on the image says exactly how far down that is.
How the packaging works
Title
The title claims a superlative, the world's oldest underwater hotel.
Thumbnail
The porthole shot puts you inside and the text adds the depth.
Remix this
Use this when you can go somewhere your viewers cannot. Shoot from inside the experience looking out, not outside looking in, and place one number that measures how extreme it is.
The transferable lesson
Sell access to a place viewers cannot go themselves.