In the provided video 'iSiNXXX - Black Widow,' there are four images that are presented as thumbnails: img-3, img-2, img-1, and img-0. These images depict explicit adult content involving sexual activity between a woman and a man. The woman appears to be in various positions, including being on top of the man in some images, while in others she is lying down with her legs spread open and engaged in sexual acts. It should be noted that this is not suitable for those under 18 years old or for those who may find explicit content disturbing. The video title 'iSiNXXX - Black Widow' suggests a theme related to the woman's role in the video.