Substack wants to have its HBO moment. Here are its plans to crack TV.

Substack cofounder Hamish McKenzie envisions people watching and commenting on shows on the platform.

Jeremy Cohen; Courtesy of Substack

What if your favorite TV show was also a blog? With a livestream? And you could interact directly with the creators and stars in the comment section?That's part of Substack cofounder Hamish McKenzie's vision for how the platform can expand beyond newsletters. Substack wants its HBO moment.Substack launched a TV app in January, and McKenzie said he sees a future where people use the platform to subscribe to their favorite channels, studios, or independent filmmakers — along with listening to podcasts, reading the written word, and commenting."It's already happening," McKenzie told Business Insider in an interview during an all-day event this week.Feet away from McKenzie was Ben Sinclair, the creator and star of HBO's "High Maintenance," which aired from 2016 to 2020. His latest project, "The SUR Experience," isn't dropping weekly episodes on a streaming service. It's not on YouTube, either. It's on Substack.

Ben Sinclair of HBO's "High Maintenance" brought his newest show to Substack.

Jeremy Cohen; Courtesy of Substack