I think a rough rule of thumb would be that a video up to two minutes is possibly a teaser/trailer to peak your interest. You see one that is six to seven minutes and it’s likely pirated. There was a time where one or two people could scrub the sites and find clearly pirated material. I just checked one “Hawaiian” sounding site and they had links to over 100 Femdom clips from just today (including one 6+ minute Clubfom clip). They do link to both Fred and premium content. They list clips from various sites, I don’t believe they host any content.