Jeremy Gendelman sat his paternal grandfather down at their family’s Denver kitchen table in 2008, a camcorder trained on him, and asked a single question.“Where were you born?” Yakov “Yasha” Gendelman didn’t stop talking for three hours. “I was born in 1930 in the Soviet Union,” Yasha began. “My childhood was not the best.” Those words, captured on early-aughts videotape, became the introductory lines in Gendelman’s podcast “Yasha,” which launched in September with a five-episode first season that can be found wherever you get your podcasts and has since been spotlighted by Apple Podcasts as a show worth catching. Podcast episodes...