Rovan Wernsdorfer was a "folk historian" for Baltimore City. He interviewed and researched the stories behind places and events in Maryland, and especially focused on stories illustrating structural racism in Maryland and Baltimore City. His stories recorded on YouTube can be found here:
Jonathan and Ruth put together this self-guided Baltimore City Redlining Tour of places in Baltimore that illustrate redlining over the generations, based on the book Not in My Neighborhood, by Antero Pietila, with additional stories from Rovan (above). In order to appreciate the dense context of this tour, it's best taken in several segments to really absorb the information.