Yes, mostly film and games. Its really breaking down each offensive possession, who took the shot, where they took the shot, did they make it, how long into the shot clock before shot clock taken, how many passes, strong side or weak side of the floor, did the ball touch the paint, sets vs man, sets vs zone, was it a higher percentage shot, offensive rebounding etc, its greats cos you have numbers to back it up, the analytics, and analytics usually are players, sets, game plan (adherence), rotation and play specific.
Usually they will be looking for trends over several games, or the season, as well as, game by game which is usually within most scouts. Analytics can help a coach identify their team, or player or sets weaknesses and maximize her team's strengths. The analytics, the data helps back up Coach's teachings or words, especially for this younger generation. Melanie Malcomb had the same role during their Championship year.
Yes, it watching a lot of film!