Over the past decades, digital video compression technologies have become an integral part of the way we create, communicate and consume visual information. Digital video communication can be found today in many application sceneries such as broadcast services over satellite and terrestrial channels, digital video storage, wires and wireless conversational services and etc. The data quantity is very large for the digital video and the memory of the storage devices and the bandwidth of the transmission channel are not infinite, so it is not practical for us to store the full digital video without processing. For instance, we have a 720 x 480 pixels per frame, 30 frames per second, total 90 minutes full color video, then the full data quantity of this video is about 167.96 G bytes. Thus, several video compression algorithms had been developed to reduce the data quantity and provide the acceptable quality as possible as can. This paper starts with an explanation of the basic concepts of video compression algorithms and then introduces several video compression standards.