Grockit Answers! by Grockit
Built on Popcorn.js, Grockit Answers is a Q&A site that attaches each submitted question and any submitted answers to the exact point in the video at which they are most relevant. As a viewer, some of the things that confuse you are are likely to be the same as what confused others before you. In a time-anchored Q&A on Grockit Answers, just as the question begins to form in your mind, it may magically pop up on the screen, along with a few great answers.