Please keep in mind I have not done any real world testing on this, however, you would likely be able to do some basic streaming media from a 256-512MB Windows Virtuozzo VPS. It will also depend on how many users are connecting.
Most providers wont use Windows Web for a Windows Virtuozzo server as Windows Web does not come with the ability to install the full Terminal Services software which means that the total number of simultaneous remote desktop connections across the entire node would be limited to 2. That being said, pretty much all companies offering Windows Virtuozzo "should" be able to support this.
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