They have yet to build such a camera.
And it depends upon what "good zoom" means.
The longer the zoom, the shutter lag gets longer.
You can find digital cameras with a very fast 0.1 or 0.2 second shutter lag.
But they will be 3X optical zoom.
10X lenses will have a shutter lag of about 0.5 or 0.6 second.
Night pictures are possible with just about any digital camera.
But you will need to set the camera on a tripod or some sturdy surface.
Hand holding the camera while doing low light or night shots will result in a blurred picture.
All digital cameras can do video.
The video is OK but not as good as what a Digital Camcorder can do.
I would like a digital camera that is small, fast delay, good zoom, good quality pics, night pictures if possible, optional video. Is there such a thing out there? Budget of around $300 or less if possible but if not realistic please tell me what is the realistic price.