This is certainly very erotic and will probably appeal to many women, but it doesn't offer direct encouragement to cuckold. In my experience, for many women the real hurdle is accepting that their bf or husband can legitimately want this while still loving and respecting her. That she can in fact share this lifestyle with her significant other -- and other men! -- and still feel good about herself in the morning. Let's be honest -- it runs against all typical conventions of relationships.
If the goal is to let videos do the talking, I would start with straight, high quality, erotic IR porn, one black man and one white woman, nothing over the top. Look for romantic scenes, sexy and interesting environments (e.g., outdoors? in a tub together?). And make sure the man is very attractive (i.e., lean and athletic body, handsome face, well-endowed but not necessarily crazy big). Find a few like this and work them into the porn rotation. People on this site know how erotic and beautiful the bm/wf contrast can be. Hopefully she'll agree.
Then I would ease in a gentle introduction to cuckolding, absolutely NO gang-bangs, ****** bisexuality, male chastity, pegging, etc., at least not at first. Look for scenes where all three participants are on screen together and are all obviously enjoying themselves. Just have the cuck gently masturbating nearby, eyes glued on the lovers, not actively participating. Ideally, the woman will make occasional eye contact with the cuck, not to mock him but to lovingly tease and excite him. A good example is "Evil Cuckold 1" starring Krissy Lynn and Sean Michaels. It's a great scene where it's obvious the wife and husband are loving partners in crime, and they both get a lot out of it.
Start with the sweet, erotic side of the lifestyle, and only later move into the kinkier stuff. That's my two cents, and I hope some of you find it helpful.