The filename "9522196-4k.mp4" typically identifies a high-definition, 3840 x 2160 pixel stock video asset found on platforms like Pexels and Pixabay . These files, commonly featuring nature or urban scenes, are often licensed for commercial use and utilize efficient codecs such as H.264 or H.265. For more details on 4K standards, visit Roku . What is the license of the photos and videos on Pexels?