Arnold Böcklin (1827 - 1901) was a Romantic painter who liked to tackle the great themes : life, fertility, death, oblivion and resurrection. Much of his work is marvellously mysterious or evocative. He painted the Isle of the Dead - in fact he liked the subject so much that he painted various versions.
What you've got here is a little animation short which is a meditation on one of his "Isles". It's nice to watch and it shows respect for the source material, which is always a plus. However, it doesn't add much in the way of new angles or fresh insights. Viewers wanting to study the work, can look just as well at a good reproduction.
If you're looking for a different take on the "Isle of the Dead" theme I can recommend Roger Zelazny's novel, about a human with near-godlike powers who is forced to confront both his past and the frailty of life. It's a cracking piece of fantasy / science fiction.