Substack cofounder Hamish McKenzie envisions people watching and commenting on shows on the platform. Jeremy Cohen; Courtesy of Substack Substack wants to be a place where people come to watch TV. Cofounder Hamish McKenzie pitched Substack's vision of interactive, creator-led TV. Substack faces stiff competition ranging from free streamers like YouTube to paid ones like Netflix. What if your favorite TV show was also a blog? With a livestream? And you could interact directly with the creators