media:content-only mapping dropped media:thumbnail elements, but YouTube (and podcast) feeds carry their only image there — media:content is the video/audio itself. Map thumbnails as image/thumbnail media so the SPA's existing image pick renders them. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HuVbgSbyfRBkd4XkEDHV4B