2160p (4K): The resolution. This requires a 4K monitor or TV to see the full detail.
Powerful CPU/GPU: HEVC decoding is resource-intensive. A modern processor or a graphics card with hardware acceleration (NVIDIA GTX 10-series or newer, or AMD Radeon RX series) is recommended.
: 10-bit HEVC decoding is intensive. You generally need a modern processor (Intel 7th Gen+ or AMD Ryzen) or a graphics card (Nvidia GTX 10-series+) that supports hardware acceleration. : To see the HDR (High Dynamic Range)
Use Plex or Jellyfin. These are media server applications that organize your movies.
Locate your downloaded file: Anna.2019.2160p.10bit.HDR.BluRay.8CH.x265.HEVC-PSA.
K-Lite Codec Pack: A collection of codecs that can enhance your system's ability to play various audio and video formats. Download from https://codecguide.com/download_k-lite_codec_pack.htm. Be cautious and select the version that matches your needs (e.g., Basic, Standard, Full).
The keyword you provided — anna20192160p10bithdrbluray8chx265hevcpsa install — appears to reference: