Beau
You “can” do video astronomy without a computerised goto mount. But it will be a much more pleasant experience if you get one.
A lot of the stuff you want to look at is below naked eye visibility and if you are using a 1/3” CCD camera (as most of us are) you will end up with quite a small field of view.
You can buy a Skywatcher Star Discovery Pro Alt/Az Mount (computerised/goto) for about $600 that will hold a 6kg payload.
https://www.myastroshop.com.au/products/sw-mount.asp
Furthermore, you don’t need a large aperture for video. Many people use 80mm refractors (like Chris) and get excellent results.
Cheers
Robert
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