What is the input format for "User Requirement:"? I want to perform a video QA task, but after running python main.py, I don't know how to input the video and the question. When I only input the example string from the readme after User Requirement:, it reports an error: "Trying to generate agent graph (attempt 3/3)
WARNING:root:Agent graph generation attempt 3 failed: 'str' object has no attribute 'choices'."