One of the artists in the video was explaining how the bundle works / what it is and said basically that it was available to mac and pc users, then: "and linux...whatever that is..." and then there was something at the end (blooper?) of him mentioning no need for steam codes and that it was "linux compatible" with a confused expression and then getting up and walking away.

It didn't seem like it was insulting linux (or its users) to me, either the artist was reading from a script and really didn't know what linux was, or it was just a mild joke playing off the fact that your average person doesn't. Seemed fairly harmless to me, and linux users are overrepresented in the humble bundle so the context (if it was a joke) is probably appropriate here anyway.

"works on linux...... whatever that is" about halfway through and then at the end "it even works on linux (person has a wtf look on his face)"