| Type | Example | Primary Index Key | Access Model | | :--- | :--- | :--- | :--- | | | Internet Archive | Filename, upload date | Free, no attribution | | Test/Demo | demo-uhd3d.com | Bitrate, codec, duration | Free, direct download | | Stock Footage | Pexels, Artgrid | Visual tags, emotion, motion | Freemium / Subscription | | Private Server | Unsecured NAS drives | Directory tree, filesize | Unauthorized (illegal) |

: With 4x the resolution, mattes (the edges of a subject) are much more accurate, leading to more natural-looking composite images.

: While YouTube is for the masses, Vimeo is for the cinematographers. Their 4K index is curated for artistic excellence. Storyblocks

Below is a comprehensive dossier on the state of 4K video content.

Copy and paste these exact search strings into your search engine to locate unsecured 4K video repositories: 1. The Standard Video Format Search