Lecture recordings from the previous years
can be found at http://dmms.at.ifi.uio.no/inf5090/Lectures/
Recordings from 2013 are published in Flash and MP4 format. The Flash version allows you to navigate through the slides and search text in them. You just have to go inside the folder of the respective lecture's date and open the .html file that wraps slides, video, and controls. The MP4 format is suitable for reproduction in iOS devices, this format, however, does not have text search or navigation options.
Recordings from before 2013 are in different formats. For .lpd files, you need to download the Lecturnity player available at:http://dmms.at.ifi.uio.no/inf5090/Lectures/tools/. Additionally, you might need to download a codec. Filenames of video recordings state the codec you need. For example: INF5090-DSMS-2011-Oslo-1-xvid.lpd needs XVID codec.