Hi Brian - welcome to the community! What type of device are you using to display your dashboards?
If you’re using Fully Kiosk Browser on an Android or Fire tablet, there’s an integration for Hubitat and SmartThings that would allow you to change which URL is loaded:
Using that, you could either directly load the URL for the stream from TinyCam or you could have another dashboard with just the media tile filling up the dashboard and fast switch between dashboards.