The .mkv extension is ideal for home media. Unlike MP4, MKV can handle:
The BluRay tag indicates the source is not a web rip, a broadcast capture, or an upscale, but a direct remux or encode from a physical 4K Ultra HD Blu-ray disc. Why does this matter? Commercial 4K Blu-rays are authored with high bitrates (often 50–100 Mbps) using the HEVC (H.265) codec. They contain the closest representation to the film’s original 2K or 4K digital intermediate. By encoding from a BluRay source, the creator of this file avoided the compression artifacts common in streaming services like Disney+ (which typically cap 4K at ~25 Mbps). Frozen.2013.2160p.BluRay.AV1.TrueHD.Atmos.en.mkv
provides "object-based" 3D surround sound, allowing audio to move above and around you. Commercial 4K Blu-rays are authored with high bitrates
At its heart, Frozen is an exploration of how fear can paralyze a person and isolate them from those they love. provides "object-based" 3D surround sound, allowing audio to