We are calling
GET https://www.googleapis.com/youtube/v3/playlists with list of "snippet", "contentDetails"
In reponse the following information about playlist
{"etag": "9BbnnTkZofkYBfqB6UXVYUvAadQ","items": [ {"snippet": {"channelId": "UCRYsHawFt_7zIRPIoEjWy5g","channelTitle": "ELFSACK","description": "","localized": {"description": "","title": "The Non-Conformist Club" },"publishedAt": "2025-09-26T06:04:30.598Z","thumbnails": {"default": {"height": 90,"url": "https://i.ytimg.com/vi/RrSjmX5eJHw/default.jpg","width": 120 },"high": {"height": 360,"url": "https://i.ytimg.com/vi/RrSjmX5eJHw/hqdefault.jpg","width": 480 },"maxres": {"height": 720,"url": "https://i.ytimg.com/vi/RrSjmX5eJHw/maxresdefault.jpg","width": 1280 },"medium": {"height": 180,"url": "https://i.ytimg.com/vi/RrSjmX5eJHw/mqdefault.jpg","width": 320 },"standard": {"height": 480,"url": "https://i.ytimg.com/vi/RrSjmX5eJHw/sddefault.jpg","width": 640 } },"title": "The Non-Conformist Club" },"status": {"privacyStatus": "public" } } ]}But the cover playlist has another img and in thumbnails we have the images of the first video in the playlist
We what to get cover image in thumbnails block