Movie S1.

Movie of the mechanical metamaterial upon manual actuation of the central unit cell. On top is the real image and in the bottom is the image variance. The first video shows the metamaterial in the non-winding non-Hermitian topological phase, where the edge mode is localised on the right (non-reciprocal parameter ε = 0.00). The second movie shows the metamaterial in the winding non-Hermitian phase, where the edge mode is localised on the left (non-reciprocal parameter ε = 0.20).