in my opinion solid materials are consisting of number of atoms which regularly arranged in a crystal lattice for short range arrangement or a long one. Moreover, they characterized by a strong field between atoms that keep them together.
When I compare your definition to the one from the video, the part about the strong field (interactions) that keep them together is correct, although it is better to describe it as nuclei and electrons, rather than atoms. The video definition also says that it is important to mention that they follow the laws of quantum mechanics.