Program schedule To not take any chance to get late and start out of cue sync, we recommend the following schedule, especially if you are planning a massive output (i.e., multiple channels): The loopable material is necessary to make sure the operator has enough time to start all the streams before t1 and ensure a proper event end after t3 The Timed preroll (i.e., countdown) is optional and must be scheduled to start at a predefined t1 time  The Main program can but doesn’t need to be merged with the Timed preroll .  To avoid useless complexity we ask organizers to fill and use our template for simulive and thrid parties streaming projects. It's available in  Microsoft Excel  format.