Using a Cushy text field for pointing to a website

There is a YouTube website I follow that changes its location often. I have the youtube player on my Blocs website, but then I need to change the Url when it moves.
I want to use Cushy to update since its quicker.
So, I need html code for the Cushy field to be used by the YouTube player as its source.

Hope that makes sense and Thank you all !!