ISTWCMS-3577: adding stylings for remote video

source/_patterns/04-components/remote-video/_remote-video.scss

+.uw-remote-video {
+  &__wrapper {
+    margin-left: auto;
+    margin-right: auto;
+    text-align: center;
+  }
+
+  &__wrapper.uw-contained-width {
+    @include uw-contained-width;
+  }
+
+  .media-oembed-content {
+    width: 100%;
+  }
+}

source/_patterns/04-components/remote-video/remote-video.twig

+<div class="uw-remote-video">
+  <div class="uw-remote-video__wrapper {{ width }}">
+    {% block content %}
+    {% endblock %}
+  </div>
+</div>