What changed:
Added shared YouTube publish-date scraping helpers in
[includes/db.php](/Users/tyemeclifford/Documents/GH/mediaplayer/includes/db.php).
New YouTube imports now set videos.created_at to the original YouTube
publish date when available.
Manual Add/Edit saves now also try to correct timestamps for
YouTube-backed videos.
Added Admin Dashboard → Upkeeping → Correct YouTube timestamps in
[admin/index.php](/Users/tyemeclifford/Documents/GH/mediaplayer/admin/index.php),
with batch size control for backfilling existing records.
Renamed the admin table column from Added to Date, since it may now
reflect original publish date.
Documented the behavior in
[README.md](/Users/tyemeclifford/Documents/GH/mediaplayer/README.md).
Ty Clifford
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