QUESTION html5 video in blog post only shows in backend

[pigsound]

Ckeditor might have stripped it out, did you reload the page and make sure it saved

yes, i did: i logged out from backend and logged back in - post including the html5 code is still there and running (in the back end). but on the front end the code is missing. apart from that i noticed that also common formatted text <p> entered in the text editor won't show in the front end of this one post … all other post contents work perfectly.

the blog post's xml:

Code:

<?xml version="1.0"?>
<item><thumbnail></thumbnail><slug><![CDATA[video]]></slug><tags></tags><date><![CDATA[2017-12-28 15:41:31]]></date><category><![CDATA[External_Event]]></category><author></author><private></private><ort><![CDATA[Ort]]></ort><uhrzeitstart></uhrzeitstart><datum><![CDATA[-]]></datum><uhrzeitende></uhrzeitende><title><![CDATA[Video]]></title><content><![CDATA[&lt;p&gt;Content Text&lt;/p&gt;
&lt;video controls=&quot;&quot; height=&quot;360&quot; id=&quot;sampleMovie&quot; preload=&quot;&quot; width=&quot;640&quot;&gt;&lt;source src=&quot;http://www.xyz.at/data/uploads/2017-11-10-video.mov&quot; /&gt;&lt;/video&gt;
    &lt;!-- &lt;video controls=&quot;controls&quot; height=&quot;300&quot; name=&quot;Caption&quot; src=&quot;http://www.xyz.at/data/uploads/2017-11-10-video.mov&quot; width=&quot;400&quot;&gt;&amp;nbsp;&lt;/video&gt;--&gt;
]]></content></item>