Dont know how the MS plugin can be implemented, but there is no
usable QT plugin for Linux except for very simple content.
I think you're confusing MPEG-4 with QuickTime. Although QuickTime
on Mac
and Windows supports MPEG-4, MPEG-4 is a different thing than
QuickTime and
is well-supported on Linux, mobile phones, iPod, PSP, etc. Linux
can be
used to both deliver and view MPEG-4.
Indeed. We use QuickTime (QuickTime Broadcaster, QuickTime Streaming
Server, etc.) to deliver MPEG-4 content that is viewable not only
with QuickTime on Windows/Mac OS X, but also on Linux, set top boxes,
and so on.
In fact, the fact that QuickTime can deliver content to alternate
platforms using open standards (MPEG-4, H.264) and protocols (RTP,
RTSP) is exactly why we chose QuickTime.