I had a watch, some good work there but it still wasn't clear exactly the intent of the video. Is this to be used as a training video for cert III at tafe/rto? If so, you'd need to bring it a little more in line with best practice rather than what we do every day. Off the top of my head, you'd want to get rid of "two hands on the saw wherever possible", and probably go towards tying knots rather than using a karabiner. It did look from the video that the marl was set quite far from the hinge, giving the potential for the the butt of the limb to kick back if the rigging line was over tensioned and not allowed to run. Setting the marl as close as practical to the hinge is a good practice generally.
I've taught cert II a little, and lead some discussions at cert III. If it were me putting together a training video for a cert III rigging class I'd be focussing more on the specifics and details fot he actual rigging - when to use a marl (extra friction) vs a straight running bowline, trying to use a running bowline at a fork on smooth gummed barks then a marl to shorten it up for example. Then the implications of tying it left/right. Putting an overhand knot at the pulley while scarfing, rigging forces and loads. Some good threads on here about light rigging/loading, and CTF, WLL and MBS should be part of the course materials. Probably going into the implications of tip tying vs butt tying logs when lowering off in terms of safety and shock loading.
One thing I've tried pushing which received a lukewarm reception at TAFE was self lowering using stubs as friction. I think it's a practical and useful skill that every climber should have up their sleave, particularly new climbers who are unlikely to have trained groundies or much equipment at their disposal, and who are likely to end up with simple easy jobs to do in their own time. It's a technique I still use on a regular basis.
