The fantasy movie -- which marks novelist Rowling's screenwriting debut -- is scheduled to open in theaters Nov. 18, 2016.
Set in the 1920s, it stars Oscar-winning actor Eddie Redmayne in the central role of magizoologist Newt Scamander. The movie was directed by David Yates, who helmed the last four Harry Potter blockbusters in the eight-picture franchise.
"This world, it's been a wonder, really. It's just unlike anything I've ever been a part of," Redmayne said from the film's set in Saturday's 3-minute-long featurette, which introduces new characters and which has already gotten nearly 1 million views.