Apple has added AMC and The Hallmark Channel to the universal search function on the fourth-generation Apple TV in the United States, enabling viewers to search for popular TV shows such as The Walking Dead and Better Call Saul in addition to holiday-themed programming such as Countdown to Christmas.
For those unfamiliar with universal search, it’s a feature that allows users to conduct Siri voice searches or text-based searches to find TV and movie content across a wide range of channels. At launch, universal search only supported a few channels, but Apple has been rapidly expanding the feature to encompass additional channels.
Apple TV universal search is now available for a wider number of apps in the U.S., Australia, Canada, and the U.K., but the feature is limited to iTunes and Netflix in France, Germany, Mexico, the Netherlands, Norway, Spain, and Sweden. In some other countries and regions, only movies in iTunes are supported.
Source: Mac Rumors