Cutscenes
This article discusses the use of cameras and conversations to create map cutscenes.
Though information on these topics already exists (see Resources below), there isn't a single place that shows you how to create a scene using these technologies.
Hopefully, the following will fill in that gap.
The information is presented in 5 parts:
Part 1 - Camera creation, pointing the camera, starting the scene, changing cameras, ending the scene, and the infamous "cinematic" spawnflag
Part 2 - Splines, camera movement
Part 3 - Conversation, vocals, camera position, lighting, where to place the player
Part 4 - Animation, triggers, sound effects, objectives
Part 5 - A step-by-step breakdown of the Somewhere Above the City cutscene
Each part includes a (small) map which you can edit to test things.
Camera Creation