GET http://localhost:5155/gw_ai_class/api/videos_all/2024年公文写作秋季班/03｜第3天：五大维度句式训练/
For JSON format, add the query parameter: ?format=json
GET http://localhost:{{port}}/folder/videos_all/2024年公文写作秋季班/03｜第3天：五大维度句式训练/
Always returns JSON with directory structure and navigation links