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MKV is an open-source, container-based video format designed to hold multiple types of content, including video, audio, subtitles, and chapters. It’s ideal for high-definition videos due to its flexibility and the ability to store large files. MKV is widely used for HD video streaming and supports a variety of codecs.
FLV is a video format commonly used for streaming videos over the web. It’s supported by Adobe Flash Player and offers high compression rates, making it ideal for online video content. FLV files are used by many video-sharing platforms but are less commonly supported by modern devices compared to MP4.