AT&T Labs developed a program in the early 2000s called 'Playmail' where you could send people emails, but instead of a regular text email, it would be a virtual yet realistic human face reading it.
The offical website for the service describes it as follows:
"You will be able to send your friends a message like a traditional e-mail and they will not get just a simple text but rather a streaming video showing a synthetic (but realistic!) character that reads them your message. You will choose the face model that will convey your message. After they get your PlayMail, they will be able to answer to you with another PlayMail."
The service was shut down long ago, and no video footage of the 'synthetic character' reading an email exists from what I can find
Here's an archive of the offical Playmail website if you want more information about it: