Can Arduino stream video using WiFi?

Is Arduino powerful enough to stream live video via WiFi if you attach a camera to it?

Almost certainly not. Sorry.

I’d try a RaspberryPi or BeagleBone.

Is Arduino powerful enough to stream live video via WiFi if you attach a camera to it?

Certainly. Although one frame an hour might not match your definition of "live".

johnwasser:
Almost certainly not. Sorry.

I’d try a RaspberryPi or BeagleBone.

Good alternatives. Are there any other options available?

A very small laptop, striped down to the mother board.

Good alternatives. Are there any other options available?

wifi cam.