Sherman’s Gaming has posted a good video on harvesting various crafting materials for all professions in ESO. The focus of the video is on the starter regions which make ideal harvest zones: easy to get to by new players, smaller zone area, and abundant variety of crafting items.
One thing I appreciated was that he provided a review of the items harvested to give an example of the types of harvest yields the view can expect to get. He mentions a few other areas but unfortunately often references zones and not specific named locations. Duration: < 20 minutes.