The large pics in the custom library (that have the play buttons on them) are already
perfectly sized (width 790) to fit onto Lead Capture Page #1.
You can manually adjust the pic size by changing the numbers in the 'Width' box. (seen at 1:08)
To adjust the timer, copy a 'manual' version page.
Search the source for the word 'Timer'
Search the very next line down (from left to right) until you find it.
Order of timer parameters from left to right:
Year, Month, Day, Time.