I think what's not apparent in the video is that in this scene Johnny 5 is leaking battery fluid after being beat up by the guy in the boat's goons. He had his friend drag him to Radio Shack and perform some makeshift repairs. Meaning that he's LITERALLY bleeding to death in this scene and he only has about 10 minutes before his battery dies and he's trying to stop the bad guy from escaping with a shit ton of diamonds that he accidentally helped him steal. And him becoming "alive" was a complete fluke. If his battery dies, he dies. Forever. They can repair him and turn him back on but Johnny will be gone.
In other words Johnny is choosing to make amends for his own mistake even if it kills him instead of just letting Oscar go and getting himself repaired properly.
In that context the entire montage has much more impact because it is a hugely selfless act of trying to fix a mistake he made instead of saving his own life.
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