I found an amazing lecture series from the Cathedral of the Immaculate Conception out of Tyler, TX on the Apostolic Fathers. It’s a series of three separate YouTube videos that covers 5 separate Apostolic Fathers.
youtube.com/watch?v=YXeOinocQF4 <---- St. Ignatius of Antioch
youtube.com/watch?v=UxTe1SVbT9o <---- St. Polycarp and St. Irenaeus
youtube.com/watch?v=PktAmR7wJMg <---- St. Clement I and the Didache
All three videos offer AMAZING insight into what the early Church taught and are very good for apologetics or for converting our separated brothers and sisters in Christ.