Blu-ray 1080p movies tend to be around 35-45GB per title. 4k movies tend to be around 70-100GB per title. The disc capacity contributes a lot to disc authors t

Blu-ray 1080p movies tend to be around 35-45GB per title. 4k movies tend to be around 70-100GB per title. The disc capacity contributes a lot to disc authors tweaking codec settings to value quality above file size. Visible artifacts are fairly rare even on complex scenes. You could practically believe you're watching a lossless source.