The Great Wall of China seems to be a VHS tape converted to the DVD format because the video image is fuzzier than expected. Also, the original copyright date is 1997.
Otherwise, the material is an interesting and brief history of China's feudal states, why and how the wall was built and the later development of China by the emperors. The Chinese love walls!
The last quarter of the program turned out to be more interesting as it incorporated recent history such as President Nixon's visit to the Great Wall in 1972. It also explains that the Chinese authorities ignored the significance and preservation of the Great Wall until the arrival of awestruck tourists from other countries.