With regards to videos, there are two trains of thought - Skill and/or Game video. A large number of coaches want Skills, a large number of coaches want Game and a large number want both.
I recommend a two step approach to the video - Start with a Skill video of approximately 3 to 4 minutes in length, shot in a controlled environment (practice or private training) which provides many repetitions of the skill sets to be used in college. The goal of this first video step is to garner the attention of the collegiate coach, and get the PSA on the program's recruiting database.
The second step is the Game video - It is important to make the Game video as current as possible because the PSA's abilities will be judged in real time. If a coach comes back from a tournament in Dallas, after watching a few setters, then remembers that there is a video of your setter out in California, the coach will judge your setter against what they just saw live in Dallas. There will be no 'offset' or accommodation if your PSA's video was from 4 months ago.
Coaches put various weight on each video, but starting with a short Skills video, then following up or having a Game video available is a good starting point.
In terms of the video itself, coaches want to see repetitions. Rarely will a coach offer a scholarship just off of video, most especially at the DI level. We want receptions so we can do a first evaluation on the various skill sets specific to the position. We each have a certain eye for what we want to see; we each have preferences for how we want a certain skill set performed. It is frustrating only getting a couple of examples of an attack, or a block, or a pass, because it is hard for coaches to really get a first evaluation.
With regards to the setter video, this may be the hardest position to capture on video just because of the position dynamic. So much of an evaluation of a setter must be done in person because of all the nuances; how does she communicate with her hitters, how does she communicate with her coach, what is the level of her hitters, what is the level of the block she is setting against, what is her court demeanor, is she loud or quiet, is she a leader, does she run an offense or just set, etc?
I believe the setting video should be focused on the Skill segment and create this Skills video in a practice or private training situation. I want to see a setter 'dry' setting all the zones for the OH attacks (no hitter), so I can see her hand release, body position, footwork and targeting. Then I want to see her setting the MB position with a live hitter, so I can see the placement of the ball, the hand position and the consistency. My whole focus is her setting the ball. If I am happy with her physical ability with the ball, then I will make plans to come see her in person to evaluate all the additional details I listed above.
A few coaches may ask for Game film of setters, just to get another layer of evaluation, especially if they won't be able to see the PSA in person immediately. But, this Game film tends to be a two dimensional when trying to evaluate those nuances.
As to your specific questions:
1) Series of sets to the specific zones of the court.
2) Skills video should be the first video sent, but have Game video ready.
3) Make all video as current as possible, especially the Game video.
Good luck this club season and keep working through the recruiting process!