The easiest way to go about this is to to unpbo some user made or BIS official mission that has cutscene(s) in it and take a look at how it's done.
Also you might wanna familiarise yourself with
sqf scriptingcamera.sqs.
The tutorial is valid for Arma2 too, the same control stuff etc are there.
What you need to be aware of is that in Arma you have to kinda "pre-render" the cutscene because the game uses data streaming and without doing that "pre-rendering" your cutscenes would show objects that slowly morph from lowest detail into the highest detail etc annoyances.
This is why there are two sets of camera related scripting commands.
Scrolling down
this list You will see the commands like camPrepareTarget, these are used for the "pre-rendering" and then the commands without the 'prepare' part are the actual camera controlling commands.
Unfortunately I can't really help any further because I have not made one single cutscene post-OFP so I'm not completely sure how these work.
Also, do these cutscenes even work in MP missions
Just wondering since you're posting in the MP specific board..