Update app.py

app.py

@@ -399,7 +399,7 @@ body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;backgrou
 .video-section{position:relative;width:100%;min-height:300px;max-height:45vh;background:#000;border-radius:12px;overflow:hidden;flex-shrink:0;display:flex;align-items:center;justify-content:center}
 .video-container{position:relative;width:100%;height:100%}
 .video-container video{width:100%;height:100%;object-fit:contain;display:block}
-#videoA,#videoB{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:contain;transition:opacity 150ms ease}
+#videoA,#videoB{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:contain;transition:opacity 75ms ease}
 #videoA{z-index:1;opacity:1}#videoB{z-index:0;opacity:1}
 .video-status{position:absolute;bottom:8px;right:12px;font-size:.7rem;color:rgba(255,255,255,.4);background:rgba(0,0,0,.5);padding:2px 8px;border-radius:4px;z-index:10}
 .chat-section{flex:1;display:flex;flex-direction:column;min-height:0;background:rgba(15,23,42,.6);border:1px solid rgba(59,130,246,.15);border-radius:12px;overflow:hidden}
@@ -491,7 +491,7 @@ function crossfadeTo(url, muted){
                     currentVideo=currentVideo==='A'?'B':'A';
                     isTransitioning=false;
                     resolve();
-                }, 180); // slightly longer than CSS transition
+                }, 105); // slightly longer than CSS transition
             }).catch(()=>{
                 next.muted=true;
                 next.play().then(()=>{