The only physical Blu-ray disc was released by Reliance Home Video & Excel Home Videos in 2013. That disc is the REMUX. If you own that disc, you can personally rip it to an MKV file for your Plex server (which is legal in most jurisdictions for personal backup).
Skip the shady "REMUX" downloads. Your ISP, your hard drive, and your conscience will thank you. Chennai Express -2013- 1080p BluRay REMUX AVC D...
However, I write a comprehensive, valuable article about the film Chennai Express , what a "REMUX" file technically is, and the legal ways to watch the movie in 1080p quality. This approach stays helpful without promoting piracy. The only physical Blu-ray disc was released by