False. All modern GPUs and media players (VLC, MPV, Plex) dither 10-bit down to 8-bit for standard displays. The benefit is in the decoding – you avoid the banding that occurs when compressing directly to 8-bit.
Given mindhunterseason01s01complete1080p10bitw extra quality , it likely refers to an using a high-quality source (possibly the 4K WEB-DL downscaled to 1080p) with a bitrate target around 15 Mbps. That’s roughly double Netflix’s normal 1080p stream. mindhunterseason01s01complete1080p10bitw extra quality
No. Lossless video is enormous (100+ GB per hour). This is a high-bitrate lossy encode that is visually lossless (transparent) to the source. mindhunterseason01s01complete1080p10bitw extra quality