fix load finished and show video

src/pages/introductionPage.jsx

@@ -51,9 +51,13 @@ function IntroductionPage() {
             {loading ? (
                 <LoadingScene />
             ) : (
-                <IntroductionPageData />
+                <div>
+                    <IntroductionPageData />
+                    <PlayVideo onVideoReady={handleVideoReady} />
+                </div>
+                
             )}
-            <PlayVideo onVideoReady={handleVideoReady} />
+            
         </div>
     );
 }