https://www.cnet.com/news/new-marvel-avengers-infinity-war-trailer-teen-groot-speaks/ >In the video, released on Twitter Tuesday, we see footage of the Avengers teaming up with heroic allies Black Panther, Doctor Strange and the Guardians of the Galaxy to fight Thanos and hopefully save the world. >Plus, there's additional footage of teen Groot playing a video game, and not surprisingly saying "I am Groot."