Screenshot the 1280×720 area above to create the thumbnail PNG.
Save as: medsafePresentationThumbnail.jpg
Thumbnail: Captures the 1280×720 composition as a real PNG file and registers it under medsafePresentationThumbnail.
Captions: Generates a real .vtt file from the approved caption data and registers it under medsafePlatformOverviewCaptions.
Video MP4: Automated MP4 export is not supported in the Base44 environment. There is no server-side H.264 encoder or headless-browser capture pipeline. Use external screen recording (OBS / QuickTime) from /presentation/medsafe-product-story/record, then upload the final MP4 via the Asset Library.