完成fetch

docs/flv/index.html

@@ -19,7 +19,8 @@
     <div class="container">
         <div class="part-top">
             <div class="config">
-                <input class="urlInput" type="text" value="https://blog.zhw-island.com/assets-cdn/video/one-more-time-one-more-chance-480p.flv">
+                <input class="urlInput" type="text" value="./video/again.flv">
+                <!-- <input class="urlInput" type="text" value="https://blog.zhw-island.com/assets-cdn/video/one-more-time-one-more-chance-480p.flv"> -->
                 <div class="btns">
                     <input class="playBtn" type="button" value="Play">
                     <input class="fileBtn" type="file">