GET http://localhost:5155/gw_ai_class/api/videos_all/工作简报专题/第4天 工作简报常见句式/
For JSON format, add the query parameter: ?format=json
GET http://localhost:{{port}}/folder/videos_all/工作简报专题/第4天 工作简报常见句式/
Always returns JSON with directory structure and navigation links