fix(examples): make video fits within window (#7129)

examples/streaming/index.html

@@ -4,6 +4,10 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <style>
+      body {
+        margin: unset;
+        overflow: hidden;
+      }
       video {
         width: 100vw;
         height: 100vh;