Additional Video 1:
In-situ TEM recording of stripy domain formation and expansion in GeSe during loading via the PTP method, followed by gradual fading and disappearance during unloading (original speed).

Additional Video 2:
In-situ TEM showing the high reproducibility of stripy domains in GeSe over 28 loading-unloading cycles via the PTP method (sped up 2.5×).

Additional Videos 3-6:
In-situ HRTEM capturing atomic-scale evolution of a stripy domain during a single loading-unloading cycle via the PTP method (original speed).

Additional Video 7:
In-situ HRTEM capturing atomic-scale evolution of a stripy domain over six loading-unloading cycles via the PTP method (original speed).

Additional Video 8-9:
In-situ HRTEM capturing atomic-scale evolution of stripy domains during loading and unloading with larger PTP devices (original speed).

Additional Video 10:
In-situ TEM recording of the formation and dissolution of a wedge-shaped twin domain in GeSe during loading and unloading under slightly off-axis tensile loading (original speed).