Hi, Joseph.
Wow, you've been a Smalltalk fan for a very long time!
There's no support in Squeak for video streaming over a network connection, as far as I know.
There is support for Squeak to play old-style MPEG movies. (Note: it doesn't work with the newer MPEG-4 format as far as I know.) This is supported via the MPEG plugin, which runs on Windows and Macintosh for sure, and may run on Unix/Linux as well.
To experiment, get a MoviePlayerMorph from the "new morph" menu.
My information may be a little out of date; hopefully someone will jump in and correct me if I'm wrong.
-- John
squeakland@lists.squeakfoundation.org