Cloudflare Stream: how is a video shorter than 1min billed?

Hello all,

Looking at our analytics for Cloudflare stream, the calculated minutes appear higher than what we would have expected. In a bid to better understand the pricing here:

Would a 10 second video played once get billed as 1 minute (rounded up), or would it take 6 independent plays to get billed at 1 minute?

For context, most of our videos uploaded to Cloudflare Stream are likely to be under 1 minute - thus it makes a big difference to us if the minutes are rounded up - or taken as the total sum of all seconds across the month.

kind regards,
James