Six months ago, with little fanfare, Mathias Döpfner launched his own video podcast. In MDMeets, the statuesque Axel Springer C.E.O. sits down with a political or industrial potentate—former Iranian crown prince Reza Pahlavi, Hungarian P.M. Viktor Orbán, a Sam Altman or Satya Nadella type—for a high-minded volley of “big ideas” that he then posts on YouTube. On some level, it’s the sort of harmless indulgence that journalists turned executives—particularly billionaires who own 20-plus percent of their company—tend to afford themselves once they’ve grown restless in the corner office. Remnick’s Radio Hour and VandeHei’s career-coach missives are subsets of the genre. For Mathias, it’s a chance to scratch the Davos–Milken–Sun Valley itch in the off-weeks.