add final demo video

Author: thienle210303

front-end/src/pages/AboutPage/AboutPage.jsx

@@ -146,7 +146,7 @@ const AboutPage = () => {
         <div className="w-full md:w-3/4 aspect-video bg-base-200 rounded-box overflow-hidden">
           <iframe
             className="w-full h-full"
-            src="https://www.youtube.com/embed/VIDEO_ID"
+            src="https://www.youtube.com/embed/dS5AbGMsWeo?si=H6n-889if53Zvl5M"
             title="Final Demo Video"
             allowFullScreen
           ></iframe>