Very oddly, I cannot watch any videos a TV channel website, for example this one: http://www.kanald.com.tr/GalipDervis/Videolar/

I can see from the frame source that it contains an embedded Adobe Flash video and some Java scripts (all of which don't pose any problems elsewhere).

I've tried different web browsers (Chrome/Chromium/Firefox), but it seems I have some sort of video codec problem in my system.

I have installed all sorts of gstreamer plugins, codecs, etc. (maybe too many?) to avoid such problems, but strangely I can watch these videos using Linux Mint 15 Live Session on the same machine.

I wonder how I can find out why a particular video (like this one) won't work on my system?