I'm not a G2 type and it's been 17 years and +100k miles since I did the suspension on my G1 coupe.
Working on the strut assembly off the car is typically how it's done. The rubber bushing doesn't appear compressed enough. Since the struts are original to the car, it might just be time to do the struts while you have it off the car.
In your video, is that a plastic, snap-on cover over the strut? Can you access the nut if the cover is removed?
Hmm, perhaps you're right. Time for some parts shopping...
As for the plastic snap-on cover...that's just a trim piece. I don't think you can access that from outside in the interior. I suppose if you removed the rear tray, you could access the struts easily. I've never done that before though. Could be an option.
To access the rear struts on the G2, you need to remove the rear speaker, and then reach in and remove the rubber dust cover over the strut, and then you have access to the strut bolt.