Yeah, this is most familiar to me too. Still, I'd argue it's 1-based. 00:00 is a point in time, but the first second is between 00:00:00 and 00:00:01, and it's

Yeah, this is most familiar to me too. Still, I'd argue it's 1-based. 00:00 is a point in time, but the first second is between 00:00:00 and 00:00:01, and it's "00:00:01" when it has elapsed. No?