https://www.cancer.gov/about-cancer/causes-prevention/risk/hormones/reproductive-history-fact-sheet
It appears to be breast, ovarian and uterine cancers.
It appears to be exposure to the bodies sex hormones, primarily during reproductive years.
Taking certain types of hormonal birth control seems to have a similar protective effect, while others have an increased risk (At least in the case of ovarian cancers).
File size is a major limiting factor in high speed video and to a lesser extent convenient ultra HD digital film. At 3840x2160 (basic 4k) uncompressed 10-bit video 1 frame is about 250 MB. An hour of footage at 30 fps then is about half a terabyte. At "only" 1000 fps you would burn through an 8 TB SD card in... 32 seconds.