Guix, A sympathetic PotentialUser reported that they were unable to play any of our home-page videos on their iPad. Even Firefox didn't work. Leo pointed out that we use the VP9 and Opus codecs — both of which are still not supported by Apple[0][1]. Nor is Vorbis. nginx can easily sniff iOS/Macintosh user agents and serve them an inferior format to match, such as h264 with MP3 audio, which can both be encoded using free software in Guix. Kind regards, T G-R [0]: https://caniuse.com/#feat=opus [1]: https://caniuse.com/#search=vp9