The Life is Strange Directors' Commentary video, which is an hour of the creators talking about the game and its story, was originally announced as part of the physical, Limited Edition of the episodic adventure game. However, anyone who doesn't feel like picking up a box in 2016 can still get access so long as they own the game on Steam. It's been released as free DLC that can be launched from in-game.
Life is Strange was Matt's pick for one of the best games of 2015.
Accessing it should be as simple as going to its own Steam page and hitting Play if you own Life is Strange. If that doesn't work you'll need to go to LiS in your Steam library, right click and hit view downloadable content. In there should be a checkbox you can tick to make it start downloading, which will be 2.9 gigs on top of yesterday's 4 gig patch. If it's not in there and you definitely already patched, try booting up the game and then quitting again, as that seems to fix it for a few people. It's a shame the commentary isn't in the Valve style of being integrated in the game, though does at least mean you can watch it without having to replay the whole thing.
That patch was detailed and includes various minor fixes as well as subtitle support for a large number of new languages including German and Spanish. It also includes the greatest patch note of all time:
- Various subtitle sizes available: normal, large, hella large.
This, incidentally, is also the sizes PCGamesN staff members come in. I belong to the most fabulous category.