"Longhair Exclusive" has excellent videos including long hair, hair cutting, shaving, hair pulling, shampooing, etc. It is run by a woman named Romyna who has long hair and can be seen in this video preview:
DeviantArt has AI images with a wide variety of hair fetishes. Some of the people there have also posted here. For long hair, I would especially recommend:
deviantart.com/hairpulling2000
For cutting and shaving as well as long hair, this is an excellent place to start: