Use an attribute for a weblink

I’ve got an attribute (that changes, hence it being an attribute) (example):
Screenshot%20from%202019-02-05%2006-50-38
that I would like to use as the url: of a weblink (i.e.):

          - type: weblink
            name: stuff
            url: sensor.next_launch_stream

But that doesn’t work right. the “sensor.next_launch_stream” not it’s content, ends up being the literal web address.
Any thoughts on fixing this?

Are you using Lovelace yet? If so, I think this will work for you:

And maybe the built in markdown card might work, but I’m not sure.