input, it's live (either on its own, or as part of the side-by-side view).
Similarly, if it's got a green border, as in the second input (you can
see it if you look closely; it's a somewhat lighter shade of green),
-it will be marked with green. On conflict, red (live) wins, since it is
-the most important piece of information.
+it is the preview. On conflict, red (live) wins, since it is the most
+important piece of information.
If you have many channels, the default single-row view can make for previews
that are somewhat small. If so, you can switch to the *video grid display*;