loggand :
clutchc :
You can install either or both. It depends on what type of cooler you want. The heatsink is the part of the cooler the fan attaches to on most conventional air coolers.
Is there a video showing installation of both?
That will depend on 1) the motherboard, 2) the cooler you have, and 3) the room in the case you have. Maybe you better list your system specs and explain what you want to upgrade to.