async function getRutubePreview(id) {
let url = `https://rutube.ru/api/video/${id}/thumbnail/`;    
let response = await fetch(url);

if (response.ok) { 
  let json = await response.json();
  console.log(json.url);
  return json.url;  
    
} else {
  return `{"error": "Ошибка HTTP: ${response.status}")`;
}
}
getRutubePreview('86da488c8e7f1427049c2f2fea207989');