The remaining chicks are doing well, have their eyes open, and are starting to find their voices.
Please read this: During a bitterly cold night, 4 of the chicks stayed out of the nest and perished. The video feed has been cropped to not show the dead chicks. I will change it back when then the remaining chicks are big enough to start exploring the nestbox and test their wings in preparation for fledging. It's not nice to see the more brutal side of nature, but that is life in the box.