I had the same problem. All I did was follow the link, then I fumbled trying to click on the white "play" triangle in the lower-left corner of the video-rectan

I had the same problem. All I did was follow the link, then I fumbled trying to click on the white "play" triangle in the lower-left corner of the video-rectangle, until I realized that the teal-blue octagon was the way to start the playing...and, after a while, I realized I was listening to the Openstack audio, even though the title displays as "The Linux Kernel..."