Succession creator Jesse Armstrong will deliver a keynote address at the upcoming Banff  World Media Festival. The multiple Emmy winner has also made his directorial debut with the Steve Carell-starring HBO movie Mountainhead , a drama about billionaire friends during a rolling international financial crisis and entered to compete in this year’s Banff Rockie Awards competition.   “Jesse Armstrong doesn’t just capture the cultural conversation, he drives it. Having him join us at Banff alongside an incredible lineup of creators, executives, and industry disruptors says everything about where the global media business is right now: bold, unpredictable, and evolving fast,” Jenn Kuzmyk, executive director of the Banff festival, said in a statement.…