|I won't offer any suggestions related to how to do this, but I will offer this for your consideration:|
What you think your emails are going to look like is not necessarily what the receiver will see.
The formatting of received emails is ultimately controlled by the email client (application) on the receiver’s end. Some clients will strip off all images, some will change them to attachments, and some might even block the entire email if it thinks the animated image might be a harmful script.
Even the preferences set by the user can control the way emails look when opened. Some users might allow HTML and images to work automatically, some want all text with the option to activate HTML and images on a note by note basis.
I'm not saying that you should never use animated images and fancy fonts; I'm just saying that you really don’t know what the end result will be.
As an example, I often get emails that appear to have an attachment. When I open the attachment it is sometimes nothing more than a “virtual business card” that the sender has used a signature. It probably looked real nice at the bottom his email when he sent it, but my email client considers it an attachment and removes it from the body of the note.