My wife and I went in Miami yesterday, I started a thread with our experience, but here are some vids I took:
First lap of the race around 4pm:
Track practice before the race around 11am:
About 20 min before the race, the drivers do 1 final lap and wave to all the fans:
Before the race, the i8 Safety Car was moving around the track. Several passes with both engines pushing, and a few with all electric driving: