You know, H264 (and no matter what bitrate) is doing thanks to badly codec macroblocks in shadows big blocks, and HEVC is keeping quality and noise like source prores. Original prores video have 30GB I'm for quality. Obviously 1080p HEVC have 150mbit, and 4K must have 2x more bitrate (300mbit). You can convert video to less size
Hope you have good 4K tv what can handle this bitrate I will soon upload Robyn's video in 4K with 192/24bit audio...be prepared for high file size
Sony X950G Which Robyn song? I like With Every Heartbeat but that's very CG heavy and not really a good candidate for a upscale