The first guy in the team watches the action section, then do his troop's moves, save the file in different name, for example: the turn is XXX vs XXX +XXX 022 you save the file with different latter XXX vs XXX+XXX H 022. The second guy cant watch the action section in the saved file so he watches it in the turn it self (the first guy send the turn he played back to the Dropbox file wit the "H" turn) then, when the second guy finishes his moves he presses the red button thus moving the turn to the opponent.
I actually can watch the action sequence, as I have access to Stardekks turn file and the password, I just have to make sure I issue my orders in the saved file that Stardekk sends to me.