To demonstrate that our algorithm can also be used for downscaling videos, we applied it to the 4K video Fuerteventura 4K (youtu.be/40s_HSZkt3U) by Sven Schall and Lukas Schmid. It is downscaled from 4096x2160 px to 320x180 px. In the video we compare our algorithm with λ=[0.5, 1.0] against the Lanczos filter and Öztireli and Gross [2015]. Further, a short sequence using Kopf et al.'s [2013] algorithm is provided. To downscale these 15s of video, Kopf's algorithm required more than 16h. Although the authors stated that their algorithm is not suited for videos, it shows very few temporal artifacts. The video is encoded as MP4/H264. If you encounter problems viewing the video, please try the VLC media player.
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