update vanilla ads example to demo new UI.

examples/vanilla-ts-esm/public/mux-player-google-ima.html

@@ -52,12 +52,21 @@ <h1><a href="/">Elements</a></h1>
       </div>
     </header>
 
+    <!--
+    single preroll skippable
+    adtagurl="https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_preroll_skippable&sz=640x480&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&correlator="
+
+    VMAP - Pre-roll Single Ad, Mid-roll Standard Pod with 3 ads, Post-roll Single Ad
+    adtagurl="https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/vmap_ad_samples&sz=640x480&cust_params=sample_ar%3Dpremidpostpod&ciu_szs=300x250&gdfp_req=1&ad_rule=1&output=vmap&unviewed_position_start=1&env=vp&impl=s&cmsid=496&vid=short_onecue&correlator="
+    -->
     <mux-player
       id="muxPlayer"
       title="Big Buck Bunny"
       stream-type="on-demand"
       playback-id="VcmKA6aqzIzlg3MayLJDnbF55kX00mds028Z65QxvBYaA"
-      adtagurl="https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/vmap_ad_samples&sz=640x480&cust_params=sample_ar%3Dpremidpostoptimizedpodbumper&ciu_szs=300x250&gdfp_req=1&ad_rule=1&output=vmap&unviewed_position_start=1&env=vp&impl=s&cmsid=496&vid=short_onecue&correlator="
+      muted
+      adtagurl="https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/vmap_ad_samples&sz=640x480&cust_params=sample_ar%3Dpremidpostpod&ciu_szs=300x250&gdfp_req=1&ad_rule=1&output=vmap&unviewed_position_start=1&env=vp&impl=s&cmsid=496&vid=short_onecue&correlator=
+      "
     ></mux-player>
 
     <a href="../">Browse Elements</a>