Amazon Press ReleaseThe 49ers-Cardinals game is the first NFL game to air on an exclusive national basis on Prime Video and Twitch, and will be available to more than 150 million paid Prime members worldwide, and in more than 240 countries and territories excluding China, the United Kingdom, the Republic of Ireland and Spain. The game will also be televised in both teams’ home markets on NBC affiliate KNTV in San Francisco and FOX affiliate KSAZ in Arizona, and it will be available to stream nationally on mobile through the NFL, 49ers, Cardinals, and Yahoo Sports mobile properties.
To switch between audio feeds, simply open the settings on their device, select the broadcast of their choice.I believe that it's a Fox broadcast crew being used for this game.
Alternate audio feeds featuring either Hannah Storm and Andrea Kremer or Bucky Brooks, Daniel Jeremiah, and Joy Taylor will be available for both games on Prime Video. Cari Champion, Chad “Ochocinco” Johnson, and Von Miller will livestream the Christmas Special on Twitch, and Andrew Hawkins, Cari Champion, and Chris Long will stream the Dec. 26 game on Twitch—both streams will be available at twitch.tv/twitchsports. Joe Buck and Troy Aikman will once again serve as the default FOX broadcast for the Vikings and Saints with Erin Andrews and Kristina Pink on the sidelines, and Andrew Catalon and James Lofton will be the default commentary crew with Sherree Burruss on the sidelines for the 49ers and Cardinals game.