Vibrator on LetMeJizz
Most of these run on a simple setup, one performer reclined with a humming toy pressed right where it counts. From there the scenes split, some keeping it solo with a woman working herself over slow, others handing the toy to a partner who controls the pace. The appeal sits in the reaction, the way a steady buzz drags out every twitch and gasp until she can't hold still. Plenty of clips push it to oversensitivity, keeping the toy going long after she comes.
655 vibrator videos here, all HD and all free. New ones go up daily, so check back if you don't find your scene first time around.