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

php - Fetch highest thumbnail resolution - Stack Overflow

All about Thumbnail Images as ytimg maxresdefault especially in Search

All about Thumbnail Images as ytimg maxresdefault especially in Search

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

All about Thumbnail Images as ytimg maxresdefault

get-thumbnail option gives url to broken images. · Issue #402