Given a Mediasite 7 presentation URL such as http://example.com/Mediasite/Play/xxxxxx, there is a "manifest" file http://example.com/Mediasite/PlayerService/PlayerService.svc/json/GetPlayerOptions which can be obtained with a POST of JSON data giving the ResourceId xxxxxx
This manifest contains metadata about the presentation, such as title, description, length, plus the URL of the video media and timing of the slides, if any. For on-demand (recorded) presentations, there is an MPEG4 video using the H.264 codec. This may be played natively in the Chrome browser, or played in other video tools such as:
Mediastite 6 on-demand presentations play natively in Google Chrome which is available for CentOS 6. That is the easiest and preferred way to view presentations in Linux, since the slides and video are displayed in sync.