javascript - jwplayer can't play Qiniu external link?

Qiniu external link:http://7xrjj0.com1.z0.glb.clouddn.com/%40%2Fvideo/2047/f72a4e11-d0c1-42e9-bbff-aab2ee9958c1
jwplayer local video can be played:

<code>    <script type = "text/javascript" >

       jwplayer ( "container" ). setup ({

                          flashplayer : "/jwplayer/player.swf" ,

                          file : "./band.mp4" ,

                          height : 270 ,

                          width : 480

      });

   </script></code>

The above file: is changed to an external link address, the video cannot be played, and the error message is as follows:
Error loading player:
No playable sources found

Let me ask you experts, what is the reason?

Reply content:

Qiniu external link:http://7xrjj0.com1.z0.glb.clouddn.com/%40%2Fvideo/2047/f72a4e11-d0c1-42e9-bbff-aab2ee9958c1
jwplayer local video can be played:

<code>    <script type = "text/javascript" >

       jwplayer ( "container" ). setup ({

                          flashplayer : "/jwplayer/player.swf" ,

                          file : "./band.mp4" ,

                          height : 270 ,

                          width : 480

      });

   </script></code>

The above file: is changed to an external link address, the video cannot be played, and the error message is as follows:
Error loading player:
No playable sources found

Let me ask you experts, what is the reason?