Yes, if the video streaming could only be implemented in a way that prevented it's use across a wide range of systems then it would be better not to have it at all. I believe Ircle's /dcc sendvideostream uses Quicktime, which is available on all major platforms (I think) and so could presumably be supported by any clients; unfortunately it's a proprietary format which is something it would be better to avoid. I don't know the details behind other DCC VIDEO implementations (or even how many differing DCC video-streaming implementations there have been). Perhaps when OGG Theora reaches maturity it will be the best bet for an open standard, multi-platform video stream.
Hopefully there's someone on the boards who knows more about these things then me that can clear this up; I'm certainly no expert on the matter.
