Sorry for the confusion. Meanwhile I found out that the video files are .mp4 which can be viewed and that the key files are keynote files which are also there in pdf. All fine for me Georg Von: Esug-list [mailto:esug-list-bounces@lists.esug.org] Im Auftrag von Georg Heeg Gesendet: Sonntag, 28. August 2016 21:49 An: ESUG Mailing list <esug-list@lists.esug.org> Betreff: [Esug-list] How to play ESUG 2016 videos on Windows All, I know that 90%+ of all ESUG attendees are using Macs, but I don't. I saw that the videos are .key files. Technically they are zip files with a directory structure in it. Does anybody know how to play these videos on Windows? Georg Georg Heeg eK, Dortmund und Köthen, HR Dortmund A 12812 Wallstraße 22, 06366 Köthen Tel. +49-3496-214328, Fax +49-3496-214712