Yannick is the name of the Swiss mountain biker who asks Tom Oehler for help. A curve that hangs slightly outwards and rides through a compression gives him a hard time. You can watch the ascent of the key section as a cell phone video on mtb-news. It will be more interesting to see how Oehler teaches his student to ride the section smoothly. According to mtb-news.de, this will happen in the next few weeks, probably in October.
And here are a few more examples of how the riding technique god himself cracks key sections.