GET http://localhost:5156/xiaomantou/api/linxuan/video_all/2024 年春季遴选/第02天：背诵指导课程/
For JSON format, add the query parameter: ?format=json
GET http://localhost:{{port}}/folder/linxuan/video_all/2024 年春季遴选/第02天：背诵指导课程/
Always returns JSON with directory structure and navigation links