See also the links and sources in the video's description. They include peer-reviewed papers.
Well-meaning apologist have made some big mistakes when defending the reliability of the New Testament. Sean McDowell interviews Dr. Peter Gurry, author of Myths and Mistakes in New Testament Textual Criticism, to help correct these mistakes.
The topic of divorce and remarriage is one I'm not well informed on. Since I respect Mike Winger as a knowledgeable pastor, I suspect much of what he says on the topic is true. So, without having watched all the videos yet, I recommend his videos to help others think through the issues and come to their own conclusions and convictions as to what the Bible teaches concerning the topic.
Divorce and Remarriage: Everything Scripture Says
by Mike Winger
https://www.youtube.com/playlist?list=PLZ3iRMLYFlHtBvJzugPJp9P5X1T-hA91j
Jesus on Divorce by J.P. Holding
Wayne Grudem is a theologian who I HIGHLY respect. He recently changed his mind on a specific issue of divorce. See the following article at Christianity Today:
Wayne Grudem Changes Mind About Divorce in Cases of Abuse
https://www.christianitytoday.com/news/2019/november/complementarian-wayne-grudem-ets-divorce-after-abuse.html
What the Bible Teaches about Divorce and Remarriage by Paul Carter