Thumbnails
How to extract and download thumbnails
YouTube Thumbnail Resolutions Explained
Understand YouTube thumbnail sizes including maxres, hq, sd, and default — and why maxres is sometimes missing.
Why Some YouTube Thumbnails Aren't Available
Learn why certain YouTube videos don't have all thumbnail resolutions and what you can do about it.
How to Download Thumbnails
Different ways to save and use thumbnails from ThumbGrab.