Tutoring Video Activities (renamed from June Learning)

If it’s an issue there are various website converters and GitHub - tsur/vtt-to-srt: Convert WebVTT files to SubRip SRT

EDIT ffmpeg has some subtitle extraction and conversion features

https://trac.ffmpeg.org/wiki/HowToConvertSubtitleToASS

https://trac.ffmpeg.org/wiki/ExtractSubtitles