Using Item as source url for Web Frame Card

I would like to use an item at the source url for a Web Frame Card. I’m using the Zone Minder addon which gets me the url for the camera feed. I can put it in manually but the token changes after every reboot. Is there any way for me to put the item that has the url in the Web Frame Card Source URL?

If the item holds a string of the url that you want then you just need to use widget expressions to set the card’s url property to that item state: