Lanyrd now has 2,500 videos and 3,000 slide decks from events around the world
lanyrd.com
lanyrd.com
So for example, our NodeConf page now has a coverage highlights widget:
http://lanyrd.com/2011/nodeconf/
And our topic pages have a slider for exploring related slides and video. Some examples:
http://lanyrd.com/topics/scala/
http://lanyrd.com/topics/erlang/
http://lanyrd.com/topics/django/
http://lanyrd.com/topics/user-experience/
http://lanyrd.com/topics/mobile/
http://lanyrd.com/topics/javascript/
http://lanyrd.com/topics/nodejs/
We're also using the new slider widget on our speaker profile pages:
http://lanyrd.com/profile/jeresig/
http://lanyrd.com/profile/paulg/
And on our series pages:
http://lanyrd.com/series/startup-school/
http://lanyrd.com/series/fowa/
Under the hood we're using a combination of Embedly, Celery and our own custom scraping code.
But Simon mentioned there that work an API has been put on hold right now to work on other features. I've been hoping for an API for exactly this kind of app (a video mashup).
They tend to be meaty technical ones, which is the kind of thing lanyrd would likely be heavy on with all of the tech events they have.
Presentations with lots of live coding are likely not worthwhile.
I find I can often get a lot of information out of reading slides, even decks that clearly weren't designed tomb viewed without a speak. It helps to have a good understanding of the subject matter though.
Finally, if a video of a talk is already available it can be useful to flick through the slides first before committing to the 30 or so minutes it take tomwatch the video, to confirm that the material is likely to be interesting.