docs: add video content component (to be moved)

website/docs/how-to/VideoThing.jsx

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+import React from 'react';
+import Admonition from '@theme/Admonition';
+
+const Component = ({ videoUrls, children }) => {
+    return (
+        <article className="unleash-video-wrapper">
+            <div className="unleash-video-container">
+                <Admonition type="tip" title="Video content">
+                    {children}
+                    Hey! Did you know that the content in this guide is also
+                    available in video format? If that's more your speed, feel
+                    free to check out one of these related videos 🍿📽
+                </Admonition>
+
+                <div className="videos">
+                    {videoUrls ? (
+                        videoUrls.map((url) => (
+                            <div className="video-wrapper">
+                                <iframe
+                                    key={url}
+                                    width="100%"
+                                    height="auto"
+                                    src={url}
+                                    title="YouTube video player"
+                                    frameBorder="0"
+                                    allowFullScreen
+                                ></iframe>
+                            </div>
+                        ))
+                    ) : (
+                        <Admonition type="danger">
+                            You need to provide YouTube video URLs for this
+                            component to work properly.
+                        </Admonition>
+                    )}
+                </div>
+            </div>
+        </article>
+    );
+};
+
+export default Component;