How should I go about alt text for product images?

I'm selling rings, and thus, I have a lot of images just for one design. For example, one ring, will have a front shot, side shot, back shot, a video etc. How should I use the alt text? If I go with a plug-in to make my life easier, it recommends just using "Product name - company name" but this seems spammy because my company name in particular doesn't provide value? Should I use alt text for all images of a product, and if so, how should I title them? "Front view of ring, side view of ring, video of ring"...? TIA!