I thought this was very interesting and if it is fake its pretty good because it seems legit. Only bad thing is that the guy in the video cannot be located...? I'm sure if they wanted to find him we could do some detective work.
I would say it pretty obvious what happen there, the guy slip off done the pub during work, left the gate opened had too many beers came back was sick realised that he been caught on tape and quit before he got fired .
😆
That could totally be the story, because like you said they have no clue what caused the electrical disturbance in the video and it could have just been some good timing on this guys part.