I was suprised how difficult it was to turn a mundane task into a instructional video.
You have to do everything backwards (work to the camera) while trying to talk through every step, while remembering the correct sequence.
Here's a little "Blooper" vid for your entertainment.
WARNING:- conatins coarse langauge, not suitable for minors.
Vid is 2min long and 5mb
Stihl MS190 Blooper file