I would like to take a YouTube video of a lecture and sync it with another area displaying the (powerpoint/pdf) slides being discussed in the lecture.
For example, knoodle.com does this but for a price. I wonder if anyone has implemented something like that and what framework (Flash, HTML5, etc) they used.
Another good specific example can be found here. It shows exactly the kind of video-slide side-by-side visual I'm looking to create.