Open-source container supporting virtually any codec. Popular for HD video and multi-track content (multiple audio/subtitle streams).
Specifications
Extension.mkv
MIME Typevideo/x-matroska
StandardMatroska
Quality★★★★★
Compatibility★★★☆☆
Compression★★★★☆
Streaming Ready❌ No
Web Optimized❌ No
Mobile Optimized❌ No