Decent summary, and I'd also encourage the watch-in-full. Even play in the background without visual aids, as the presenters did a great job enhancing the data via presentation.
It's worth it, sat down and watched it last night. They did a really interesting, in-depth presentation including the history, quirks of the trade and video from pen tests.
* Every lift has mandated modes that allow an operator to take full control and override any building access controls.
* The security on these modes is poor.
* Don't do dumb things with elevators
I'd encourage you to watch it in full, as it is interesting and contains more detail than the above suggests.