Thanks for using our Answers Forum. I understand that you are having trouble going back and forth between the 2 video sources. That is very
frustrating I'm sure.
If you look on the bottom of your screen, you should see a "menu' button, click on that. Then you should see one that says "view sources" on the bottom right of that screen. If you click on that, you should be able to change that source.
Hope this helps.
Sling Moderation Team