Kiosk mode is supposed to reset to the first slide after 5 minutes, but
results seem to vary quite a bit. You might find this add-in to be
useful:
http://officeone.mvps.org/kioskassist/kioskassist.html
I don't know if it works on the most recent versions of PowerPoint or
not, but it is worth a try.
--David

Signature
David M. Marcovitz
Microsoft PowerPoint MVP
Author of _Powerful PowerPoint for Educators_
http://www.PowerfulPowerPoint.com/
> Hi,
>
> What is the maximum length of a movie in kiosk mode before it jumps to
> the beginning of the presentation and is there a way to stop this.
>
> Thank you