BUG: cannot configure a video block with src=null

Description

• The bug is reproduced on the current demo

What happens ?

I configured my video block with src=null like this :

class Video {
  constructor(editor) {
    let block = editor.BlockManager.get('video'); //Inherit from plugin
    editor.BlockManager.remove(block.id);

    return {
      content: {
        ...block.attributes.content,
        src: null,
        style: {
          width: '250px',
          height: '150px',
        },
      },
      label: `<div class="callout-icon callout-icon-video"></div>
                    <div class="callout-block-label">Video</div>`,
      category: 'Extra',
      attributes: {
        class: 'fa',
        'data-type': 'video',
      },
    };
  }
}

When i drag the block i get on the generated html an base64 image on the src attribute like this :

<video allowfullscreen="allowfullscreen" id="imm4" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIHZpZXdCb3g9IjAgMCAyNCAyNCIgc3R5bGU9ImZpbGw6IHJnYmEoMCwwLDAsMC4xNSk7IHRyYW5zZm9ybTogc2NhbGUoMC43NSkiPgogICAgICAgIDxwYXRoIGQ9Ik04LjUgMTMuNWwyLjUgMyAzLjUtNC41IDQuNSA2SDVtMTYgMVY1YTIgMiAwIDAgMC0yLTJINWMtMS4xIDAtMiAuOS0yIDJ2MTRjMCAxLjEuOSAyIDIgMmgxNGMxLjEgMCAyLS45IDItMnoiPjwvcGF0aD4KICAgICAgPC9zdmc+" controls="controls"></video>

Expected behavior

• I want to set a block without predefined src and give the user the ability to set the src via the trait .

Steps to reproduce on the demo

• Open the import popup and paste this and click import

<video allowfullscreen="allowfullscreen" id="imm4" controls="controls"></video>

• Reopen the import popup and you will see that the src attribute is set with the base64 image .

<video allowfullscreen="allowfullscreen" id="imm4" controls="controls" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIHZpZXdCb3g9IjAgMCAyNCAyNCIgc3R5bGU9ImZpbGw6IHJnYmEoMCwwLDAsMC4xNSk7IHRyYW5zZm9ybTogc2NhbGUoMC43NSkiPgogICAgICAgIDxwYXRoIGQ9Ik04LjUgMTMuNWwyLjUgMyAzLjUtNC41IDQuNSA2SDVtMTYgMVY1YTIgMiAwIDAgMC0yLTJINWMtMS4xIDAtMiAuOS0yIDJ2MTRjMCAxLjEuOSAyIDIgMmgxNGMxLjEgMCAyLS45IDItMnoiPjwvcGF0aD4KICAgICAgPC9zdmc+">
</video>
<style>* {
  box-sizing: border-box;
  }
  body {
    margin: 0;
  }
  *{
    box-sizing:border-box;
  }
  body{
    margin:0;
  }
  @keyframes fadeEffect{
    from{
      opacity:0;
    }
    to{
      opacity:1;
    }
  }
</style>

The conclusions of my research

It seems to be a collision between the video and the image component , because the base64 image is the fallback image for the image component .