I'm not sure what to make of this sort of thing. It doesn't make me think any the worse of Lindsay Graham than I did when he was alive, since I already assumed (as must have many people) that he was a closeted, self-hating, hypocrite.
Similarly, I think people who liked and supported the late senator will find it very easy to dismiss posthumous allegations about him. Had they been made earlier it might have been a different matter, but since there's now no chance the allegations about sex workers will ever be tested in court, they don't mean a great deal.
I just don't see the point. I've seen plenty of rightly hostile comment about Graham both before and after his death, and I don't see what the video adds to it.