Hi my daughter is a shorter GK (5’6 in cleats, although college has her listed at 5’7) and is a freshman. During your research look at the size of the GKs on the rosters, it is a reality for our kids that height will matter at many schools. Have her focus on what she can control and really work on ball handling (holding the ball vs pushing or kicking OB for a corner), explosive jumping, vocalization and directing the back line and strength in her punts and goal kicks.
Film should showcase 1-2 wow saves, high balls, low balls, 1 v 1, footwork, distribution and set pieces. It usually took my GK 2-3 weekends of league (ecnl) play to get 1-2 min of useable film. She emailed highlights out about every 5 weeks and after every showcase. You can also use training film and scrimmages. We just used an iPhone that I held and recorded during games and our teams trace videos.
Good luck! It is quite a journey and has so many ups and downs but you are starting early so giving your daughter a great chance to explore her options and cast a wide net