Is it a bird? Is it a plane? Nope. It's a drone...
The video shows Astor Hall, the Bill Blass Public Catalog Room, the , and the . The drone flew after hours so as not to scare the patrons.
Click here to read the blog post by Morgan Holzer of the New York Public Library. Again, it's very cool.
“A good Booke [sic] is the precious lifeblood of a master spirit, imbalm’d and treasur’d up on purpose to a life beyond life.” - from Areopagitica, by John Milton