Ckeditor removes html5 video block during initialization

Question

I have div contenteditable with video After initialization ckeditor video disappears.

I tried ckeditor4 and ckeditor5 inline 11.2.0 All scripts in my local server, not cdn. Browser Firefox anf chrome

<div id="editor" contenteditable="true">
    <p>Lorem ipsum ...</p>
    <video src="[realy correct path to video]" controls></video>
</div>
<script>
    ClassicEditor.create( document.querySelector( '#editor' ) );
</script>

As a result, I get this:

<div id="editor" contenteditable="true">
    <p>Lorem ipsum ...</p>   
</div>