Always check for standing water! Use low pressure so you don't force water into any electrical components and dry up any standing water so it doesn't find its way into vital parts of the engine, like the cylinders or around the sparkplugs.
Thanks for the video. Would have been nice if we had some voice over for each steps… I would blow dust the engine before putting any water there. I guess this engine was not that filthy. I would avoid using a hose like this. Rather use a steam cleaner to remove tough stain and then follow with an engine cleaner solution. The blower you are using might be handy but would use a air blaster to ensure water is taken out at all cost. It is also easy to manuver around tight spaces. Great share!