An excellent but brief overview of the history of ODF. Well worth watching if you're interested in #freesoftware but unfamiliar with with this bit of history.
"A silent war has shaped the digital world: ODF vs OOXML. From the rise of OpenOffice.org and #LibreOffice to Microsoft’s controversial standardization of OOXML, this video tells the untold story of control, freedom, and the future of digital documents."