Guitar Player TV is a joint venture between Music Player Network, publisher of Guitar Player Magazine, and TrueFire TV, an "Internet TV broadcast network."
If you go to the site you'll find a collection of short instructional pieces, performances, and interviews. Roger McGuinn has a section called "McGuinn's Den" where he talks about songs and shows a few things. It's not exactly an instruction class, nor is it just a performance.
It will be interesting to see how/if this expands. At the moment it seems a little empty; if you're not interested in the things that are there, then you will get bored rather quick. I also think it needs a better explanation of what all the parts are (a table of contents kind of thing!) There should also be graphics and text to go with some of the instruction; but then maybe they don't want to replace the magazine (and if that's a case, does this link to content in the magazine?)