This addon installs extended rich text editor that accepts each available code.
Module adds also new plugins to our tinyMCE like fontawesome or youtube. This means that you can easily add:
font awesome icons to the descriptions of your products, categories etc. You can add easily youtube videos and edit params of the videos like size, hd quality etc.
you can find this module here:
tinyMCE pro - extended rich text editor for PrestaShop