Merge pull request #161 from googlefonts/About-videos-info-update

About videos info update

Author: emmamarichal

gf-guide/article.md

@@ -73,6 +73,24 @@ Please refer to the [Promote your font](./promotion.md) section of this Guide fo
 The recommended width is at least 1000px. You don't need any particular proportions; the container will resize the image.
 - Resolution: 72dpi.
 
+#### Videos
+
+There are two options to include videos in the Article file: `MP4` with a max file size of 1.4 MB; and a `YouTube` link.
+
+- For the `MP4` video inclusion, it must follow this format:
+
+   `<video autoplay muted src="your-video-name.mp4" type="video/mp4"></video>`
+
+   You can see this case as reference: <a href="https://github.com/google/fonts/blob/main/ofl/danfo/article/ARTICLE.en_us.html">Danfo</a>
+
+
+- For the `YouTube` link, this option requires a cover image to display as preview, and must follow the following format:
+
+   `<a href="https://youtu.be/videoIDnumber>"><img src="your-cover-image.png" /></a>`
+
+   `<p><em><a href="https://youtu.be/videoIDnumber">Watch the introduction video on YouTube</a></em</p>`
+
+
 ### Allowed HTML elements
 
 -  `<a>`, `<blockquote>`, `<code>`, `<em>`, `<figcaption>`, `<figure>`, `<hr>`, `<h3>`, `<h4>`, `<h5>`, `<img>`, `<li>`, `<p>`, `<pre>`, `<span>`, `<strong>`, `<ul>`, `<ol>`, `<sub>`

gf-guide/promotion.md

@@ -64,7 +64,8 @@ Allowed formats and file size limits for images:
 - `JPG` max size: 800 kb
 - `PNG` max size: 800 kb
 
-Another possibility is to add a YouTube link. 
+Another possibility is to add a `YouTube` link. 
+
 
 <br><br>