There's no way you can compress files without losing quality or compromising somewhere. Otherwise 4k Blu Ray discs would not be 80GB - 100GB. They'd all be about 9GB.
It depends on what codecs you want and how satisfied you are with compromising audio etc.
It depends on what codecs you want and how satisfied you are with compromising audio etc.
https://en.wikipedia.org/wiki/H.264/MPEG-4_AVC