- A standard of video quality that is 4 times better the HD, and represents about the best quality currently available.
]https://en.wikipedia.org/wiki/4K_resolution Wikipedia] says:
4K resolution, also called 4K, refers to a horizontal resolution in the order of 4,000 pixels. Several 4K resolutions exist in the fields of digital television and digital cinematography. In television and consumer media, 4K UHD or UHD-1 is the dominant 4K standard. In the movie projection industry, Digital Cinema Initiatives (DCI) is the dominant 4K standard. By 2015, 4K television market share had increased greatly as prices fell dramatically during 2014 and 2015. By 2025, more than half of U.S. households are expected to have a 4K-capable TV (2160p), which would be a much faster adoption rate than that of Full HD (1080p).
Essentially, 4K video is the next step up from HD, and represents a truly stunning level of video quality. Sites that have 4K video are generally at the high end for quality, you can watch the stuff on the biggest big screen TV and you can pretty much see the skin texture on the bumps on a girls nipples and every drop of wetness on their pussy.