Russell Crowe Claims He Caught a UFO on Video [VIDEO]

Interesting.  Russell Crowe claims that he captured "several flying objects" flying over Sydney's Royal Botanic Gardens in Australia.

He posted this video on YouTube that seems to show flying objects whizzing over the gardens. When he told the world about his video on Twitter, Russell Crowe wrote: "A friend and I set camera to capture fruit bats rising from Botanic Gardens. This was a big surprise."

What do you think? Could it be a UFO, or is there a reasonable explanation?