We are sorry, but the WordPress Review Guidelines have set some rules to use Output Sanitization of user data. In that case you can not use any HTML in text field. Actually the fields are Text Areas, not HTML. So while passing the data WordPress escapes the HTML. This Data Validation is required for security of your site for protecting injecting any code to your database by a hacker. So, using HTMl in text input field is not recommended.
The Extend Version has HTML input field and you can also input Links from the Theme Options. You can check the Simplify Extend Demo HERE and Theme Features HERE.
BTW, are you using Simplify or Simplicity?
The texts “You can also input any HTML, Videos or iframe here. But Please keep in mind about the limitation of Width of the box” should be removed in the next update. We shall remove that texts. Here it is mentioned that These features were added recently in the Free Version.
Thanks