i.ytimg.com/vi/3adW1CL0W7w/hqdefault.jpg?sqp=-oaym

404 on default image · Issue #45 · paulirish/lite--embed · GitHub

Download Thumbnail – Thumbnail Downloader

thumbnail grabber - Boing Boing

kenogh

php - How do I get a video thumbnail from the API? - Stack Overflow

kenogh

All about Thumbnail Images as ytimg maxresdefault especially in Search