At this point, the only known certain way to show the broadcast on a short-time delayed basis is to record it when it originates live at 6:00 pm Mountain Daylight Time.
The previous two Face-to-Face events were streamed only and lasted around one hour. This one will also be broadcast live on the Church satellite system.
For a one-hour delay, I would record. I would not depend on trying to start the stream an hour later and having it work.
For a two-hour delay, I would also record. I would not trust that the Church satellite system will run any delayed broadcasts as they normally would for general conference. Have a recording ready, and be pleasantly surprised if something happens.
Although the stream will be archived and available later, there has been no indication that this will happen immediately after the broadcast. It sometimes does, but I would not count on it. To do so would be too disappointing for a broadcast such as this where so many youth will be involved.
And for those few remaining who have not called the GSC, I just spoke with them, and they have no additional information other that what has been posted here and announced elsewhere.
So for planning purposes, I would suggest that anything more than what you can get from the live satellite broadcast or Internet feed tomorrow at 6:00 pm MDT will be a surprise bonus at this point.
There is always a chance for further light and knowledge Tuesday.