Anyone here know how to generate subtitles automatically using AI when a video is playing on the web? Was planning to see how I can build something like these

Anyone here know how to generate subtitles automatically using AI when a video is playing on the web? Was planning to see how I can build something like these sites but without the need to regularly update the subtitles catalog: https://subscene.be https://subscene.be https://subtitlecat.com https://subtitlecat.com https://subtitletrans.com https://subtitletrans.com https://my-subs.co https://my-subs.co