First attempt to make a sybian in Hunyuan video. It seems to have turned out ok, but not the best.

Example prompt :

riding a sybian, A 20 year old woman is sitting on a {black|white|white with black trim|white with purple trim} sybian sex device riding it between her lets. She is thrusting her hips forward and backwards on the sybian. She is naked and having an orgasm with her mouth open. The camera is head steady looking at her riding the device. She is in {the bathroom|her bedroom on the floor with her bed behind her|the living room}

Weights work ok from 0.7 to 1.2, if it starts to interfere with your prompt user a lower weight.