The homily given by Bishop Robert Barron on Pentecost 2020, which looks at each aspect of the Nicene Creed’s description of the church as One, Holy, Catholic, and Apostolic.
This teaching can also be found via the Word on Fire website, if you prefer to watch it as well as listening to it (you can jump forward to ~9:40 to hear just the homily, instead of watching the entire mass):