Move the file into your structured directory: /TV Shows/Squid Game/Season 01/ .
This means you lack the HEVC video codec. Install the K-Lite pack mentioned above or the "HEVC Video Extensions" from the Microsoft Store. squidgames01720pnfwebdlddp51atmosh26 install
If you are trying to configure your media environment for optimal playback, let me know: Your (Windows, macOS, Linux, Android TV) The media player application you prefer to use Move the file into your structured directory: /TV