Video transmission method, gateway device, and video transmission system

A video transmission method is disclosed herein. A target video segmentation is transmitted to a piece of user equipment relatively quickly, so that caching efficiency of a caching device can be improved, and a processing burden of the caching device can be reduced. The method includes: receiving, by a gateway device, a target URL sent by a second user equipment, and determining, from a caching device, a second video corresponding to the target URL; determining a segmentation part of the target URL according to the segmentation part extraction model; and determining a target video segmentation from the second video according to the segmentation part of the target URL, and sending the target video segmentation to the second user equipment.