GET http://localhost:5155/gw_ai_class/api/videos_all/十四五规划专题/第7天 课程回顾及专题部分讲解/
For JSON format, add the query parameter: ?format=json
GET http://localhost:{{port}}/folder/videos_all/十四五规划专题/第7天 课程回顾及专题部分讲解/
Always returns JSON with directory structure and navigation links