Consider exposing API to let us access all thumbnails.

[rdingman]

I'm using YouTubeKit to access the video with id lRp1JE7f-a8. When I ask for the thumbnail for this video, I get the following url:

https://i.ytimg.com/vi/lRp1JE7f-a8/hqdefault.jpg

This is image is letterboxed and not appropriate for my use case. It is the first thumbnail of the first video detail.

Instead, I'd like one of the thumbnail urls in the last video detail (the last one ideally)

https://i.ytimg.com/vi/lRp1JE7f-a8/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLAlMmS8rbMEXrDXmPfkF9IxvfKcjA

Please consider API to let us access all of this information and let us choose the appropriate thumbnail (or metadata in general) for our use case.