What Makes Shelley's "Ozymandias" a Good Poem? | Close Reading

What makes is Percy Bysshe Shelley’s "Ozymandias" such a great sonnet, and why is it so popular?

Intro 0:00-1:04
Shelley the Poet: 1:04-2:37
As a Sonnet 2:37-7:50
Close Reading the Octet: 7:50-18:00
Close Reading the Sestet: 18:00-21:31