I apologize if this has already been addressed. 

We are submitting our game today. We also wanted to add a short clip to our itch page to share a little bit more about the mental health story we are telling in the game.  We don't have the clip done yet.

If we submit the game by the deadline, can we still add to the itch page as long as we don't change the game? Or would this be considered a late submission?

Any insight would be greatly appreciated.