Flat channel listing can't return descriptions, so selecting a video showed 'No
description'. Now we do a non-flat single-video extract on demand — the way the
TV nebula lazy-loads guest stars:
- core: video_detail(id) / shape_video() — description, views, likes, duration,
tags, channel, webpage_url (full extract, yt-dlp injectable for tests).
- API: GET /youtube/video/<id> — returns it AND backfills the description onto
the wishlist row (set_wishlist_video_overview), so re-opening is instant.
- Wishlist info bar (youtube): on select, lazy-fetch → real description +
eyebrow (date · duration · views) + a 'Watch on YouTube' link; cached on the
episode object. 'Loading details…' while in flight.
Mirrors the episode lazy-load + art-backfill patterns. 73 youtube+api tests
green; brace/CSS balanced; music untouched.
- Resolver: capture banner_url + separate avatar (by thumbnail id), keeping
per-video duration/views for the detail hero.
- query_youtube_wishlist reshaped to the EXACT TV-nebula shape: channel = show,
upload YEAR = season (newest first), video = episode (newest=ep1 within a
year), carrying source='youtube' + youtube_id + per-video source_id. Surrogate
int returned as tmdb_id so the nebula's int keying just works.
- New API: GET /youtube/channel/<id> (full channel detail — meta + deeper
uploads + following + per-video wished flags) and POST /youtube/wishlist/add
(per-video wish). DB: youtube_video_wish_state, remove_one_video_from_wishlist.
- Tests updated for the nebula shape + banner + detail endpoints. 82 DB + 69
api/youtube tests green.
First slice of 'follow a YouTube channel as a show'. Pure, testable resolver:
- parse_channel_url() normalizes any channel reference (@handle, /channel/UC..,
/c/.., /user/.., bare handle, with/without scheme or tab suffix) to a
canonical /videos uploads URL, and rejects non-channels (watch/playlist/
shorts/home/non-youtube).
- shape_channel() maps yt-dlp's flat-extract dict to our shape (channel meta +
recent uploads), picking best-res thumbs, parsing sparse publish dates
(timestamp or upload_date → ISO, None when flat mode omits them), filtering
null/id-less entries.
- resolve_channel() ties them together via an injectable YoutubeDL factory.
yt-dlp only (already a pinned dep), extract_flat for cheap listing. 28 seam
tests, no network. Schema bridge + API + UI are the next slices.
