The GDC clip is basically him talking on others people work completely unrelated to what he's supposed to sell. High five!
Dino Patti, Playdead’s former CEO and co-founder and a developer of Inside and Limbo, that his Guildford-based studio Jumpship is working on a “sci-fi action adventure” called Somerville. He and film animator Chris Olsen (Skyfall, The Avengers 2: Age of Ultron, Heavenly Sword) have been working on the 2D side-scroller for the past three years.
The game is obviously in its early stages as it might take years to finish such an ambitious project with a small team. You can find more details on the production process here. And here’s how the game looked a year ago: