In a blogpost YouTube said, "We're happy to share that podcasts on YouTube are now available in YouTube Music! We're rolling this out to all our listeners in the US gradually, so hold tight if you don't see it yet."
"podcasts are a go! new features on Studio desktop now let you create a new podcast, set an existing playlist as a podcast and measure your podcast's performance."
Rolling out as a part of the YouTube Music 4.30.50 Android app, this redesigned interface for Android Auto is a fairly major shift from the old interface.