Human flight - a Dutch guy amplifies his own muscles with about 2 kW ..
Of course it might be an elaborate fake video, but a back of the envelope shows a couple of kilowatts will work with about 80kg and a 20 m2 of wing area. It is the right ballpark. Making an ornithopter work is not an easy task, but is not impossible.
The video isn't terribly convincing, but the dream is strong.
update - this appears to be an elaborate fake..
still maybe it will inspire the real thing with a workable design and at least I was able to daydream a bit