<details open>
    <summary>
        Source
    </summary>
    <div class="dropzone">
        <a href="#" class="dropzone-showbox" role="button" aria-label="Video source"
            data-bind="balloon: { component: { name: 'media-selector', params: { mimeType: 'video/', onSelect: $component.onMediaSelected, mimeType: $component.mimeType } }, position: 'right' }">
            <!-- ko if: sourceUrl -->
            <video class="fit" controls>
                <source data-bind="attr: { src: sourceUrl }" />
  