Bees will never leave the brood (at least until they do...). I took a frame of brood (eggs and baby bees developing) and put it in the nuc with the swarm, but didn't capture it on the video. Makes the videos too long...I may need to buy a cam corder so I can stop and start in the process...
There are so many details, the learning is endless. I may change my mind on that with experience.