(If actual paths differ, replace accordingly.)
Copyright infringement is not a victimless crime. Downloading a movie from an open index exposes your IP address directly—no peer-to-peer masking like VPN-proxied torrents.
This is the only legal download service for "install quality" movies. Kaleidescape offers 4K downloads with bitrates identical to Blu-ray (up to 100GB per movie). It is expensive ($5,000+ for the server), but it is the legal answer to the "index" problem.
Check services labeled "Pro" or "Ultra." Sony Bravia Core offers Pure Stream (up to 80 Mbps). Apple TV 4K streaming hits 30-40 Mbps. For 99% of viewers on a 65-inch TV, this is visually indistinguishable from a raw file.