gRPC talks, broken links

noticed these CNCF talks were broken

Author: davidraleigh

docs/talks/index.html

@@ -16,10 +16,10 @@
 </div>
 
 <div class="container">
-            <div class="col-md-3 col-sm-6 col-xs-12 pt" data-key="5QH67PXNbaI">
+            <div class="col-md-3 col-sm-6 col-xs-12 pt" data-key="OZ_Qmklc4zE">
                 <div class="pt-content">
                     <div class="img-container">
-                        <img class="pt-thumbnail" src="https://img.youtube.com/vi/5QH67PXNbaI/0.jpg" />
+                        <img class="pt-thumbnail" src="https://img.youtube.com/vi/OZ_Qmklc4zE/0.jpg" />
                         <div class="after-overlay"></div>
                     </div>
                     <p class="pt-desc">gRPC Intro - Jayant Kolhe, May 2018</p>
@@ -34,10 +34,10 @@
                     <p class="pt-desc">gRPC Load Balancing on Kubernetes - Jan Tattermusch, May 2018</p>
                 </div>
             </div>
-            <div class="col-md-3 col-sm-6 col-xs-12 pt" data-key="rf5fw_O4tnU">
+            <div class="col-md-3 col-sm-6 col-xs-12 pt" data-key="S7WIYLcPS1Y">
                 <div class="pt-content">
                     <div class="img-container">
-                        <img class="pt-thumbnail" src="https://img.youtube.com/vi/rf5fw_O4tnU/0.jpg" />
+                        <img class="pt-thumbnail" src="https://img.youtube.com/vi/S7WIYLcPS1Y/0.jpg" />
                         <div class="after-overlay"></div>
                     </div>
                     <p class="pt-desc">gRPC Deep Dive - Sree Kuchibhotla, May 2018</p>