That’s likely a copy of Avatar (2009) — meaning the video and audio are taken directly from a Blu-ray without re-encoding, preserving full quality. The specs indicate:
The Ultimate Viewing Experience: Avatar (2009) Blu-ray Remux 1080p AVC DTS-HD MA 5.1 avatar2009blurayremux1080pavcdtshdma51
What or device (e.g., Nvidia Shield, Apple TV, PC) are you planning to use? That’s likely a copy of Avatar (2009) —