Websites like MKVCinemas operate in a legal gray area (or are outright illegal in many jurisdictions) because they distribute copyrighted content without authorization. Consequently:
If you are not referring to the piracy network, the term could potentially refer to: Technical Tutorials: mkvcinemas dad link
or a "mirror" site used by MKVCinemas to bypass ISP blocks or domain takedowns. Websites like MKVCinemas operate in a legal gray