Huh. TIL: closed captions can be turned on and off. Open captions are burned into the video and always display.
Also, in the US and Canada, "subtitles" means just transcribed dialogue (typically aimed at viewers who don't understand the language being spoken); "captions" means all significant sound is transcribed (typically aimed at viewers with hearing impairment).
vis.social is an open social platform for creative people, especially anyone in sciArt, data, visualization, creative coding, and related arts and research. English is the common language of the instance.