These are formats for longer improvised scenes, or even series of scenes.
We are not going to have a philosophical discussion here, but not everyone will agree that all these are really long form formats. The Harold for example is basically a series of connected scenes intertwined with improv games. Some will argue that because of the games, this is not long form. Others again will state that any format that consists of different story lines that are not really strongly connected (e.g. Triple Play ) is not really long form.
We do not particularly care so we just list what some folks would consider long form improv formats. Your mileage my vary or course.
Improv games in this category
Improvising is for people who are too lazy to write --- Amy Sedaris