Yeah, you have a point, I forgot about video generation and send mail delay.
Check mail delay is probably not an issue because when the house alarm notifies you, instead of going to the live view, you force an email-check and (hopefully) get the mail with the video attachment within 30 seconds (or a little longer).
Knowing all this now, I have to ask the obvious question:
How the heck does Avtech manage to push the video in 5 seconds?