As fun as it was to think about developing wings to fly like a bird, physics always wins. In case you haven’t yet figured it out, the prior video was of course a fake, albeit a really entertaining fake.
That being said, here is the first ornithopter able to sustain flight. The aircraft was created by a student in the Engineering PhD program at The University of Toronto, Todd Reichert in 2010. It is human-powered and the wings are designed to mechanically flap like those of a bird:
University of Toronto News