Issue: "Can't find all video URLs from a channel"
Fix: YouTube only loads videos as you scroll down the channel page.
Scroll all the way to the bottom first, then use a URL extractor extension. For channels
with hundreds of videos, consider downloading in batches by year or playlist.
Issue: "Some channel thumbnails are missing from ZIP"
Fix: This usually means certain videos are private, age-restricted, or
have been deleted. These are skipped automatically. The ZIP will contain all thumbnails
from accessible videos.
Issue: "Channel has too many videos to process"
Fix: For channels with 500+ videos, download in batches of 100 URLs.
Sort the channel by newest or oldest first and work through sections. This also helps
organize your thumbnail archive chronologically.