Well, I'm not sure exactly what model you have, but there may be discretes for the HDMI inputs somewhere. If not, does the device have a toggle to toggle between inputs? You could then go to Vid 5 and then choose it via the toggle from there. By having the discrete from another input you're verifying that the macro would always start on the same input. A bit lengthy but usually the best workaround.

"Macro" and "Learn" are grayed out because you don't have a button selected.