У вашего броузера проблема в совместимости с HTML5
This video by National Concord Engineering Ltd. (NCE Hong Kong) shows how to operate Siemens 3VL MCCB, withdraw/insert drawout type MCCB, and install accessories such as aux. contact, trip alarm contact and shunt trip coil. It is in Cantonese (廣東話) with simple English subtitle.