[webkit-help] Play video issue with GtkLauncher

[kelvin]

Hi,

Last week I checkout webkit, build with GTK and try to use GtkLauncher.

The issue is GtkLauncher cannot play some video, like .vob, .mp4. The 
interesting thing is it can play some video file and mp3 files.

What I do:
svn checkout .. (r55831)
cd trunk
make
make install
/user/libexex/WebKit/GtkLauncher

GtkLauncher cannot play video files but no error messages printed.

Would any help to guide me what I can do to fix the issue?

Thanks,
Kelvin