The lectures on computervisiontalks are directly being taken from youtube (but tags, navigation, bookmarking and in-video search capability is added). The lecture 1.3 (for spring 2015 class) is exactly of the same length. However on youtube, the lectures for machine learning class 2013 (also by Alex Smola) are available which are of a different length.
The videos on computervisiontalks.com are exactly the same as videos on youtube because the site is pulling these videos from youtube. The post points to the spring 2015 lectures. You are pointing to earlier lectures in 2014,2013
