I don't think it's luck (but I understand the expression) who knows what his issue is. And yes, it'll likely be more terminal - though not in his case. His derailleur look ok, so I'm unsure but perhaps it was just a cable.
He said in the video it was water damage and charging/battery problems. He bought new batteries and charger in Jackson and seems to be ok again now. Hopefully that is his bad luck out of the way now!
I don't think it's luck (but I understand the expression) who knows what his issue is. And yes, it'll likely be more terminal - though not in his case. His derailleur look ok, so I'm unsure but perhaps it was just a cable.