Craig’s lecture is for a service at The Rock Church in California (by Zoom); the entire service is 1 hour and 8 minutes but Craig’s part starts at 27 minutes: https://www.youtube.com/watch?v=-cXWJjt-Eow&t=1850s
For a shorter, 11-minute version, see https://www.seedbed.com/remarriage-divorce-biblical-perspective/
There was also a question-and-answer session addressing some other questions (to be posted next week)