Multishot Mod for Minecraft 1.9/1.8.9 is basically designed for making timelapses or otherwise taking screenshots automatically, with a pre-set interval between the screenshots. It also has some other features that might be useful when making timelapses or other videos, such as a few different motion modes (linear, circle, path) and a basic zoom functionality.
Download link: Multishot Mod for Minecraft 1.9/1.8.9