Videos can be included and played in all HTML5-based output formats (like WebHelp). For example, to add a YouTube video in the WebHelp output generated from DITA or DocBook documents, follow the procedures below.
<object outputclass="video"> <param name="src" value="http://www.youtube.com/watch/v/VideoName"/> </object>
<mediaobject>
<videoobject>
<videodata fileref="http://www.youtube.com/watch/v/VideoName"/>
</videoobject>
</mediaobject>