This is a pretty good wooden horse scene. Though I don't think she went for long enough, they stopped just as she was getting to the point of actually riding back and forth. That's the true action for the horse. Constantly moving back and forth as she tries to escape the pain from pressure on her perineum by shifting forward to her labia...which is not really a relief at all after a while. So she constantly shifts back and forth until she is unable to do anything to relieve the pain.
I also take issue with her position, she is allowed to lean too far back, which is transferring weight to her buttcheeks. They easily could have used the nipple clamps to motivate her to move forward more.
This should not have ended with them being nice to her. If they want to be nice to her, then cut the vid before that. Do more whipping, especially on the tits. Whip her clit with the clothes pins on. that would be fun to watch.
I also take issue with her position, she is allowed to lean too far back, which is transferring weight to her buttcheeks. They easily could have used the nipple clamps to motivate her to move forward more.