I found that to be exceptionally helpful in my lessons.For me, it has been a combination of visual and feel that works - over the course of my lessons, my instructor would use video to show me what I was doing, then have me do drills and explain the feeling that I was looking for. Sometimes this would involve aids as a reference point so that I would get instant feedback, other times he would tell me to swing to a certain point and stop, and he would then move my arm/hip/etc to how he wanted it to be so that I could feel the difference between what I was currently doing and where I needed to be - the most common one for this was to help me shorten my backswing as it was way too long and causing me problems with consistency
After doing drills he would then video the swing again to show the difference between before and after, and I would be able to use those drills to work on the swing at the range by myself