November says on her Midnight Monkey Monitory blog:
Quite an enlightening overview from past to present. And as stated in the video, all photographs were shot in Singapore so if you haven't got a chance to visit our many offshore islands yet, this is a good opportunity. Of course, we definitely can't travel back in time so even for monkeys like me, it was refreshing and enlightening. The video is based on the NSS publications of the same title, "Singapore Waters: Unveiling our seas". I'd say it's definitely worth the 10 minutes 39 seconds of your time.
More about Singapore Waters, the book, on the Nature Society (Singapore) website, with more photos and diagrams.
Including these diagrams showing our shores in the 1950s.and in 2002,
Clearly showing what we have lost.