Hi @TimDonovanUK
If your video player in AEM Dynamic Media supports caption files, you'll need to upload separate caption files for each language you want to include, typically in WebVTT or SRT format. These files will be linked to the video assets so that they can be displayed as selectable caption tracks.
1. Create multiple caption files: Make one file for each language. Ensure that the captions are formatted correctly in WebVTT or SRT format (e.g., video-en.vtt for English, video-fr.vtt for French, video-es.vtt for Spanish).
2. Upload the caption files: Add the caption files to your AEM Dynamic Media assets, usually alongside the video files or as related assets.