Didn't watch the video but saw the term "hotwifing" and thought of the term "hotracking".
If you've been in the Navy, you know this is when there are more sailors than there are beds, and so people have to take turns sleeping in a bed when one becomes available. If you've been waiting to go to sleep, you take the first one that comes up empty, which would likely be warm because of the body heat of the person who was just occupying it...
If that is what hotwifing is, or something akin to that, I would not be surprised.