Here is why the "old" codec holds the real throne. Season 01 of Game of Thrones was shot on the Arri Alexa, but it was treated like film. Cinematographer Alik Sakharov used natural firelight and candlelight. The result was a show that looked oily and warm —specifically in the Winterfell and Vaes Dothrak sequences.
Specifically, the encodes of Season 01.
Modern streaming services use H265 (HEVC) or AV1. These are efficient, brilliant codecs. But their efficiency kills the grain. To save bandwidth, noise reduction algorithms smear the image. In the current streaming versions, look at the scene where Ned Stark cleans Ice in the godswood. The steel looks like a video game. In the version (specifically the 6-8 GB per episode rips from the early 2010s), you can see the slight, dancing filmic noise. You can feel the chill in the air because the grain makes the image unstable in a way that feels organic. The Color Timing Wars When HBO remastered the series for 4K, they regraded the color. The North is now teal. King’s Landing is orange. It is modern, punchy, and historically inaccurate to the original broadcast intent.