If everyone starts including a 2 minute intro, then it won't make you stand out anymore, and you'll need to take a different tack.
The reason I sent Chad that video was to demonstrate passion. Doing what everyone else does doesn't accomplish that.
I recommend taking this as an illustrative example, not a step-by-step guide.
100 presentations x 2 minutes is a little over 3 hours. That's not that bad. I'd imagine reading and debating a 2 page questionnaire would take longer.
We have submissions where the passion comes across in the content - in fact we've had some where people have said they really want to come and hang out at the con and this is the easiest way for them to do it (as we cover airfare and accommodation).
Having helped with conferences that strongly encourage submitting videos along with session proposals - folk would likely still stand out.
Coz a surprising number of those videos still suck quite badly...