From the sounds of it, someone apparently thought there was a bomb? He was yelling a lot, and he had said something about, "I had my headphones on; doing a live stream."
So, maybe one of the neighbours wanted to shut him up?
I was reading through the youtube comments and apparently some cruel "fan" wanted to play a trick on him and called 911 saying that the streamer was hiding a bomb in his house. Needless to say, the streamer did not have a bomb in his house.