Rails 3 Streaming Video or Rails HTTP Streaming

I recently implemented JP video player or J Player in my Rails 3 app to stream video tutorials, but issue is video is not streamed in chunks means if size of video is 100MB then after that 100MB gets downloaded on browser then only video will play. To overcome this issue i have implemented http streaming using this rails cast http://ift.tt/lL3ZLw Even then the video is getting fully downloaded. I am not able to understand what wrong i have done. When i am using curl -i command it shows me Transfer-Encoding: chunked but it is not working as youtube or other video sites work.