This sounds familiar to me. Ah yes, here it is; he did a stage version of it some time back. I posted about that last year:
These aren’t what I’d been thinking of, but McLean has come up here in the past as well:
https://talk.spare-oom.com/t/2nd-q-a-video-with-max-mclean-and-douglas-gresham/17552
https://talk.spare-oom.com/t/using-google-weekly-alerts-to-find-c-s-lewis/19616
https://talk.spare-oom.com/t/redefining-the-first-freedom-more-than-worship/17551/2
https://talk.spare-oom.com/t/recent-screwtape-video-on-cnn-website/17645