Extract a video embed partial

source/_partials/video-embed.html.twig

@@ -0,0 +1,9 @@
+<div class="{{ classes }}">
+    <iframe
+        src="https://www.youtube.com/embed/{{ video.id }}"
+        height="{{ video.attr.height }}"
+        width="{{ video.attr.width }}"
+        frameborder="0"
+        allowfullscreen
+    ></iframe>
+</div>

source/_posts/2019-06-01-drupalcamp-bristol-speakers-announced.md

@@ -4,7 +4,13 @@ excerpt: DrupalCamp Bristol is returning next month, and we have just announced
 tags: [drupalcamp, dcbristol]
 draft: true
 ---
-
-<div class="video-full">
-    <iframe width="560" height="315" src="https://www.youtube.com/embed/honnav4YlAA" frameborder="0" allowfullscreen></iframe>
-</div>
+{% include 'video-embed' with {
+    classes: 'video-full',
+    video: {
+        id: 'honnav4YlAA',
+        attr: {
+            height: '315',
+            width: '560',
+        }
+    }
+} %}