Why can't I cast to my TV with Chromecast?

Episode 1549 (1:02:10)

John from St Petersburg, FL
Hoopla

John is having trouble chrome casting with an app called Hoopla. Leo says that it's likely a rights issue, and Hoopla is preventing it on the Chromecast, but works with the iPad. Hoopla has apps for Roku and Apple TV, and they work more consistently. Leo's guessing it's a problem with Hoopla and poor Chromecast implementation.