jay,
You got it.
the math is changing your time frame to seconds. So 10 minutes times 60 gives 600 seconds, the 15 is padding for upload. So it will say "NOT Current" in red if no new file is uploaded by 615 seconds.
I watched yours it got to 10:10, I hit reload one more time, oddly the Web Cam line disappeared, hit reload again and it said "current" 0:00:15. So the file uploaded.
Andrew