sadly Quicktime is broken beyond repair, i.e. you can not do HTTP range requests to allow seeking in videos beyond the part that is already downloaded. On top of that Apple knows about this problem but ignores it. They even went one step further and just fixed it for H.264 in Quicktime X. (note that they stopped supporting 3rd party components in Quicktime X)
A: No assurance is or can be made that the License includes every essential patent. The
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same terms and to include as much essential intellectual property as possible for their
convenience. Participation in the License is voluntary on the part of essential patent holders, however.
is there a server and client that supports it?
from http://www.matroska.org/technical/guides/faq/index.html
Will Matroska be streamable? Yes, but low bitrate streaming like streaming Vorbis, will always be better in Ogg. This is because their design is for different purposes.
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