docs: update README to reflect recent Upload Modal changes

- Terminology updated: 'Custom' -> 'External Link', 'Cloudflare' -> 'Upload File'.
- Clarified that richer metadata repeaters (captions, segments, etc.) are fully available in the Edit Video modal, while the Upload modal focuses on variants and hashtags.
- Updated 'Advanced settings' to 'Advanced options'.

README.md

@@ -38,12 +38,12 @@
 
 Open the **Upload** modal from the header toolbar and start by selecting the NIP-71 event type that matches your post. The chooser sets the correct Nostr kind and schema defaults so the published note follows [`docs/nostr-event-schemas.md`](docs/nostr-event-schemas.md).
 
-Both upload modes expose metadata repeaters for **variants**, **captions/text tracks**, **segments**, **hashtags**, **participants**, and **references**. Use these when you have multiple playback qualities (variants), accessibility tracks (captions), multipart drops (segments), discoverability tags (hashtags), credited collaborators (participants), or cross-posts/threads (references). Skip any repeater you don’t need—the base schema stays valid without them.
+Both upload modes expose metadata repeaters for **variants** and **hashtags**, while the [Edit Video](components/edit-video-modal.html) modal offers the full suite (including **captions/text tracks**, **segments**, **participants**, and **references**). Use these when you have multiple playback qualities (variants), accessibility tracks (captions), multipart drops (segments), discoverability tags (hashtags), credited collaborators (participants), or cross-posts/threads (references). Skip any repeater you don’t need—the base schema stays valid without them.
 
 Pick the flow that matches your source material:
 
-- **Custom (hosted URL or magnet)**: Provide a title plus an HTTPS video URL and/or a WebTorrent magnet. The form requires at least one transport, validates `ws=`/`xs=` hints, keeps magnets raw by decoding them with `safeDecodeMagnet()` before publish, and applies whatever metadata repeaters you configured. If you submit a magnet without a hosted URL, the modal warns that availability depends on peers seeding the torrent.
-- **Cloudflare (R2 direct upload)**: Enter your Cloudflare credentials in the guided form, optionally expand the **Advanced settings** accordion to override pathing or access controls, then drop media files for bitvid to upload through the R2 API. The modal tracks progress, applies your metadata selections, auto-fills the primary `imeta` variant once the upload completes, and publishes the resulting R2 URL back into the note automatically.
+- **External Link (hosted URL or magnet)**: Provide a title plus an HTTPS video URL and/or a WebTorrent magnet. The form requires at least one transport, validates `ws=`/`xs=` hints, keeps magnets raw by decoding them with `safeDecodeMagnet()` before publish, and applies whatever metadata repeaters you configured. If you submit a magnet without a hosted URL, the modal warns that availability depends on peers seeding the torrent.
+- **Upload File (direct R2 upload)**: Enter your Cloudflare credentials in the guided form, optionally expand the **Advanced options** accordion to override pathing or access controls, then drop media files for bitvid to upload through the R2 API. The modal tracks progress, applies your metadata selections, auto-fills the primary `imeta` variant once the upload completes, and publishes the resulting R2 URL back into the note automatically.
 
 Hosted URLs remain the preferred playback path, and you can still add a magnet or supplemental web seeds when using either mode. Use the **Private** toggle to keep the resulting card visible only to you, and lean on the repeaters whenever you want to surface richer context or alternate assets as outlined in the event schema reference.