Hey,
I keep checking older class videos from time to time to see if there were any nice questions(from the audience) and answers hidden in them. I guess we will all be visiting these videos more frequently before the certification exam as well.
One really nice feature to have would be to adjust the play speed of the videos. Having the video play at 1.5 or 2 times the normal speed helps cover sessions that take 3 hours quicker and also we can easily switch pace as we desire.
Not sure how much of an effort it would be to integrate a button to toggle speed like some youtube training session videos. However if it could be done, it would be brilliant :)