The External Video component can be used to easily embed an external video into a AEM page. Currently, only videos hosted on YouTube and Vimeo are supported by the component. Experienced users can ...

Starting today, Instagram will display a share button to its desktop interface, letting you copy and paste embed codes to insert photos -- and videos -- on your blog or website. The new web embed ...

So it should use the HTML5 video if you have opted into YouTube's HTML5 trial. This will only be used for new articles, but I went ahead and re-published the article you linked.