I don't think this is a good URL change. It is not like http://conversationswithbillkristol.org is a blog spam for "Conversations with Bill Kristol". And the original site has video divided into chapters which is useful.
It was a borderline call, but I'm guessing a URL with Bill Kristol in it would have had an evil-catnip effect. So, risk mitigation.
It definitely gave me pause when I hit the YT link.