GUI feautures of event recorder

Last week I've added opportunity to view playback file screenshots directly from GUI. How it works you may see on the following video:
http://www.youtube.com/watch?v=trqPXKsAaCs

Also I've added dialog window to edit info about author, visible name and description of playback file.
http://www.youtube.com/watch?v=trqPXKsAaCs

During the work by GUI we've desided to move all operation with file to separate class. It should provide high flexibility and make possible to simple access to playback file. So I've added class PlaybackFile which works with file and provide higher level of abstraction.