Override attachment partials?

[SylarRuby]

With Trix, we could customise the layout for an attachment in views/active_storage/blobs/_blob.html.erb. I like to do the same with Lexxy. I feel the figure element was added in by JavaScript (createAttachmentFigure)? Is there a way to override blob partial, as with Trix? Why? I need to be able to play videos in the editor:

<figure class="attachment attachment--<%= blob.representable? ? "preview" : "file" %> attachment--<%= blob.filename.extension %>">
  <% if blob.representable? %>
    <%= image_tag blob.representation(resize_to_limit: local_assigns[:in_gallery] ? [ 800, 600 ] : [ 1024, 768 ]) %>
  <% elsif blob.video? %>
    <%= video_tag rails_blob_path(blob), controls: false, loop: true, autoplay: true, muted: true, playsinline: true, class: "attachment__video attachment__video--thumbnail" %>
  <% end %>
  

  <figcaption class="attachment__caption">
    <% if caption = blob.try(:caption) %>
      <%= caption %>
    <% else %>
      <span class="attachment__name"><%= blob.filename %></span>
      <span class="attachment__size"><%= number_to_human_size blob.byte_size %></span>
    <% end %>
  </figcaption>
</figure>