Lifehacker: This Setting Turns Your iPhone Into a Professional Video Camera. “Normally, iPhones shoot in either HEVC or H.264 video formats. HEVC files are smaller and more compressed, while H.264 are larger but supported by more apps and platforms. However, in your iPhone’s camera settings menu, there’s a third format called ‘Apple ProRes,’ which offers better color and less compression for a crisper, more professional look. The catch is Apple ProRes videos can be up to 30 times larger than HEVC files, so they take up large portions of your phone and iCloud storage space.”