That video is correct. The screw inside the gun that holds down the mag release spring and the trigger bar spring needs to be removed. Then pull up on the mag release spring. Slide out in one piece the mag release. Put it in the other side then put spring down inside release again. Put your springs back on top of each other and tighten screw down. Take careful note of how the springs are oriented under the screw before taking apart and put back the same way. Hope this helps.
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