streaming in Linux?

[Karen Lewellen]

Hi all,
as in streaming audio or video.
I guess the same can be said for indebted audio and video.
I keep taking seminars with replays I cannot access and it is 
becoming increasingly important professionally that I can activate video 
when it is sent via emails.
I suppose that things like firefox and perhaps even ice Wiesel swing 
this just fine?
I vaguely remember, likely old news by now though, that debian does not 
have firefox at all?
Thanks s usual,
Karen