Last.knights.2015.bluray1080p5.1ch(cm).mp4 -

Generally indicates "Chinese" (Mandarin) subtitles or audio, often hardcoded into the video file or provided as a primary track.

The file container, widely compatible with most smart TVs, computers, and mobile devices. Viewer's Guide Last.Knights.2015.BluRay1080p5.1CH(CM).mp4

Refers to 6-channel surround sound (5 full-range speakers and 1 subwoofer). widely compatible with most smart TVs

If you prefer official platforms, the movie is currently available on services like Prime Video and Kanopy. Last Knights (2015) - IMDb Last.Knights.2015.BluRay1080p5.1CH(CM).mp4