The final resolution of the file is 1920x1080 pixels. While sourced from a 4K master, it has been downscaled to standard Full HD, making it highly compatible with standard monitors, TVs, and older media players.
This indicates the file was ripped directly from a retail Blu-ray disc, not a web rip (iTunes/Netflix) or a TV broadcast. BluRay sources have a higher bitrate. While a streaming service might give you 5-10 Mbps, a BluRay rip can operate at 20-40 Mbps before encoding. The "Mastered in 4K" BluRay discs from 2013/2014 are specifically the ones you want. godzilla 1998 mastered in 4k 1080p bluray x264 dual
True 4K rips (x265) of this film weigh in at 40-60 GB. The 1080p x264 dual is 12 GB. If you have an older hard drive or a limited data cap, the 1080p supersampled version gives you 90% of the quality for 20% of the file size. The final resolution of the file is 1920x1080 pixels