You can do by creating an email answer, using rules and our email picker. Find out more here.
No - all plans include extensive branding options.
Yes, the best way to do this is via an external host like YouTube or Vimeo.
Yes, you can edit the look and feel of these emails
Yes, this is now possible
Featured boxes are part of your hosted hub theme and are very flexible
Promos are part of your hosted hub theme and are very flexible