Gjerven

I have barely started the campaign, but decided to have some fun with it.. So I loaded up the campaign missions (Good Morning Takistan first) in the editor and noticed that several persons (Graves, Pierce, Herrera) where "playable" (Drace is selected player). However I could not choose them trough the unit section in the map. So I decided to change playable to player and previewed the mission. What I got was the mission in a different "pov" with different objectives for each of these characters etc. Are these different pov's only doable in the editor or do you also get to play them when going through the campaign normally?