A system may receive a first video stream from a first source over a network; receive a second video stream from a second source over the network; store a first portion of the first video stream in a first first-in-first-out (FIFO) buffer; store a second portion of the second video stream in a second FIFO buffer; compare the first portion of the first video stream to the second portion of the second video stream; detect an advertisement and features in the first video stream based on the comparing; and analyze the advertisement to identify one or more types of anomalies in the advertisement based on the detected features.