As described by wikipedia here is archaeology in a nutshell:

Archaeology or archeology,^[1] is the study of human activity in the past, primarily through the recovery and analysis of the material culture and environmental data that has been left behind by past human populations, which includes artifacts, architecture, biofacts (also known as eco-facts) and cultural landscapes (the archaeological record). Because archaeology employs a wide range of different procedures, it can be considered to be both a social science and a humanity,^[2] and in the United States, it is thought of as a branch of anthropology,^[3] although in Europe, it is viewed as a discipline in its own right, or related to other disciplines. For example, much of archaeology in the United Kingdom is considered a part the study of history, while in France it is considered part of Geology.

That being said, the field is so vast that describing it in a nutshell is somewhat impossible.  We hope you like the video!