I've seen several, but, for the biggest part, you're right, it's just as you described initially. As far as vids go, I would tend to think it's more of a "filming plan" or something like that.
A little off-topic, but related......I actually can't even tell you how many times when talking to a female regarding either my boy personally or just the topic in general, the female reaction is to express disbelief or even amazement that I would be quite willing, and indeed prefer to FOLLOW the dog when he's finished. It's no secret that quite a few men are assholes and generally quite a bit more proud of their "abilities" than what is actually warranted, but there is also a large segment of that demographic for whom k9 is just some fuckin freak show. Time after time after time I hear it over and over.......he wouldn't touch me, he just wanted to watch me get fucked by the dog. Over the years, I've come to believe just based on the females I've talked to, that this group is WAY larger than the group I'm in.
All I can say is, Ladies, if that's what you want, go for it. But if it's not, then I would question people a LOT closer on just what exactly is going to go down and how. There are quite a few men who view you as a dream, but I do think there are more who just want to bleed the freak. Sad, but true.