Pretty sure that it's:
When you want to go on a wikipedia article, it requests the file from other peers in the network using the bittorrent protocol.
It's a copy of Wikipedia placed on bittorrent, presumably with some semantics for article updates.
I bought some shares at an IPO as a long term investment a few years ago and held onto them since. For shits and giggles I subscribed to the RSS feed for this ticker on Google Finance. This feed contains a lot of stock ratings and "buy/sell/hold" advice from various analysts. After comparing this to the actual stock value for a few years in a completely unscientific process with a far too small sample, I've come to the conclusion that either these guys don't have a fucking clue about where stocks are going to go next or are ineffectually trying to manipulate the market. I kept the RSS subscription to remind me of this.
Upon watching the video, my first thought was: I should try this! Not because I have RSI (used to though), but because it seems an excellent solution for keeping my hands on the keyboard whilst having a third "hand" for the pointer, thereby increasing overall speed and efficiency. If it is possible to achieve the same accuracy, this should be great.