Youtube Thumbnails CDN URLS: https://i.ytimg.com/vi/<video-id>/<size>.jpg https://i.ytimg.com/vi_webp/<video-id>/<size>.webp Sizes (video, channel): default - 120x90, 88x88 mqdefault - 320x180, 240x240 hqdefault - 480x360, 800x800 sddefault - 640x480 maxresdefault, hq720 - 1280x720