Hello Alan,
EAA is a technique used a lot by astro-socs for live imaging in learning situations and demos, sometimes with colour cameras which are using longer exposures. There is quite a lot written about the subject.
https://www.cloudynights.com/forum/73-electronically-assisted-astronomy-eaa/
This may give you some more ideas. The video camera we use most (WAT 910HX) can image bright deep sky objects at the longest exposure setting (5 sec) with a fast optical system. (I have also used a telephoto lens at F4). At a public meeting i showed visitors M42 through an 8″ F/4 with integrating video and some were recording my monitor with their mobile phones – a long way from science, but sows some seeds…