The humiliation is general rather than specifically relating to foreskin / circ status but there are several minor mentions and bits of play. His cock doesn't get let out of the cage and there's no real sex.
Their other vids are mostly humiliation / denial, often with ruined orgasms. I don't know if any of them have talk.
In this vid:
0:55 - his foreskin "nipple" is poking out the end of the cage and she flicks it with her fingers then says that it looks like a little tongue sticking out.
1:35 - she specifically points out his foreskin, more rubbing. This is the only direct mention.
2:05 - she says that it looks cute poking out.
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