Why did he use "where" here? Could you give me some more similar examples?
People sometimes use "when" and "where" fairly interchangeably and this is the case here. "Where" is being used to mean a place in time, rather than an actual location. Ex: We're living in a time where, more than ever, everyone has a voice. Ex: He found himself in a situation where he had to make a hard decision. Ex: I've been in a situation where I was terrified.