Welcome to your interview.
The question is on your right: Interpreting A/B Test Results. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
If you run an A/B test on YouTube and get a p-value of 0.04 with a 95% confidence interval, what does that mean in practical terms?