/r/LoadingIcons: LoadingIcons - Looping gifs and videos that are used as a waiting page for content. - May 31, 2022 - 15:00
/r/loadingicon: Interesting simple .gifs - 'That should be a loading icon!' - May 31, 2022 - 14:36
/r/perfectloops: perfectL∞ps - A collection of Perfectly Looped animated .gifs and html5 videos. - May 31, 2022 - 14:31