textarea content text with tag html

I building a form for user profile editing.
There is a textarea for description field.

If the user insert in text area the code of a youtube video file,
<object ...

when he reeditingthe the descrption the text area have problems with
rendering.

the code of view is:
<textarea name="description" id="description"

<%=@description></textarea>

Is there a function for @description, for render the text that the user
are insert and not render the video in textarea?

Thanks