I don't believe that there is an official depository for videos from the event. I doubt Vidcon would provide them because the event exists because of the money people spend to attend. I don't know if you tried but if you search Vidcon 2014 on YouTube, you can find some videos.
I recorded audio of some panels but I did not attend the one that you desire.
Here is a video of the Keynote presentation.
[DOUBLEPOST=1404316546,1404315480][/DOUBLEPOST]I noticed that Austin Null was part of the panel. He is in this video which may give you some insight.