Gaurav Trivedi has put together a landing page with all of Quoc Le’s recent lecture series and accompanying resources:

Dr. Quoc Le from the Google Brain project team (yes, the one that made headlines for creating a cat recognizer) presented a series of lectures at the Machine Learning Summer School (MLSS ’14) in Pittsburgh this week. This is my favorite lecture series from the event till now and I was glad to be able to attend them... (cont'd with all videos)