Adding video form: display "Enter some description of your video here..."

Hello.
!) Navigate to "All videos"
2) Press "Add video button"
I suggest to display in "description area" text "Enter some description of your video here..." like we can see similar in stream allready. More at the screenshot. May be this text is missed in textarea.

So webmaster can edit this line and add some rules (note) like: "Enter some Unique description of your video here (only on russian language)... Delete all advertisement links." for example.

thanks.