True, she has a German accent, but she is attempting an American accent with its r's and non-British vowels. I'm not sure she's spent much time in America, but my understanding is that a German can choose learning English with an American accent if they desire. I'm sure others here know much more about this.
ETA: Behold! I just found this. The very same young woman explains why she thinks she speaks with an American accent even though she was supposed to have been taught a British accent in school. It's kind of interesting...
Why Do GERMANS speak AMERICAN ENGLISH?