Job lot of slides for next week

I'm cross posting because I'm lazy and all my slides are in the same
deck.  Don't reply.

Attached are some slides.  Nothing particularly exciting, but there
are two main categories of things here:

Security issues
 - you'll note that this is pretty lean, that's because we don't have
much to talk about

captureStream issues
 - this has been presaged for a while, being part of the media
processing API stuff a long while back, I've been asked to present on
this and try to wrap things up, at least from a consensus perspective.
 I don't know what the plans are, but that might be worth discussing.

I'm going to send emails regarding the proposals here so we have the
appropriate venues for actual discussion.  I'm not going to open
issues now, but that might be appropriate.