Show&Tell embeds all videos through Vimeo, which does allow you to add captions or subtitles to your videos. Vimeo supports the following captions and subtitles file formats: SRT, WebVTT, DFXP/TTML, SCC, and SAMI files, but recommends using WebVTT.
If you do not already have captions or subtitles, you can purchase them from one of the following providers:
For more information about adding captions or subtitles to your video, read about them here.