Similar to TextExpander App but simulating typewriting text effect I'm looking for an app similar to TextExpander but I need that the expanded snippet to be shown simulating typewriting text effect. 

Something like shown in this YouTube video.

If not posible, can I do it with Automator?
If you mean write something in monospace font, I use TextExpander for inserting the clipboard in a specific font, where I choose a monospace font (I chose Monaco since it seems like it's available on many platforms/OS). Handy for when citing a block of code in an email for example.