The parent post didn't mention decoders / encoders, it mentioned free content. These articles[1][2] explain the costs and possible increases[3]. Apple, Microsoft, and Google have bought the license for their libraries on their platforms.

[1] http://www.zdnet.com/blog/bott/a-closer-look-at-the-costs-an...

[2] http://www.zdnet.com/blog/bott/h-264-patents-how-much-do-the...

[3] http://www.mpegla.com/main/programs/AVC/Pages/FAQ.aspx last question