Thanks for the tips, Nicole. I'd like to second the importance of testing your recording screen resolution and quality before diving into the 'real' recording. It can certainly save you headaches down the track!
One small thing I'd like to add is the importance of allowing users to control the pacing of the simulation, particularly in demo-only mode when using text instead of audio narration to accompany the process animations. Having slides change before slow readers have finished reading all content on-screen is a huge source of frustration. I've found that pausing the simulation on screens where there is lots of text (particularly when providing additional information beyond the core process steps being demonstrated), and allowing users to click 'Next' to move on when they are ready gives them a far greater sense of control and comfort, reducing that 'rushed' feeling some users report when working through systems simulations.