Johnson typically releases a new video every Tuesday evening (Eastern time), and they usually run 30-45 minutes, though they can go longer or shorter.
His style in these videos is longform storytelling. They never seem like bits that he's working out in the moment, which is part of what makes his output notable. If you like the longer form standup, and haven't sampled his work, I'd encourage you to watch a video. You probably won't stop at one.
David