A little bit of what they said about each kyuuki:
The narrator said Fuku-chan, with her experience as an Egg, did well at giving various expressions, and the cameraman complimented her on her smile.
The staff and cameraman mentioned while shooting Riho that she did really well and has good balance on her legs. Then the narrator added how this was helped by her dance experience and such.
Kanon was different - it was her first ever photo session, so she had to go through a bit more coaching
like in how to move not just part of her body for different poses. Fuku-chan and Riho were amused while watching her.
When she did the jumping, she said it was so fun! She was so natural and well... not so professional as the others.
The narrator introduced that it was also Eripon's first ever photoshoot (despite model experience? maybe it wasn't a full-on photoshoot like this). Then afterward the cameraman asked her how she did so well in the poses, and if she'd practiced on her own. She responded that she'd seen many other photos (there's that idol fangirl again), and thought from them how she could copy some of their looks herself.