Add a 'variable' input to the video widget

So that you can dynamically bring video if the url is stored in a database

Hey @mellerbeck-

This is a great idea, the underlying reason here is that video isn’t a variable type in app variables, but it is in tables.

I wrote a feature request for this addition. I also wrote a request around unifying the variable types supported in tables and apps. For example, apps allow list versions of all variables, but Tables don’t. This drives some annoying tradeoffs.

Thanks for identifying this one-