: .par... (likely .par2 ). These are "parity files" used to verify the integrity of the data and repair the main video file if parts of it become corrupted during download or transfer.
: HEVC (High Efficiency Video Coding / H.265). This is the industry standard for 4K video, providing high quality at a compressed file size. glassonion-2160p-webd-dovi-dual-pl-hevc-p2p.par...
: P2P . This signifies the file was released by a "Peer-to-Peer" group rather than a formal "Scene" group. glassonion-2160p-webd-dovi-dual-pl-hevc-p2p.par...