JSFiddle - React, Tailwind, and code Playground

HTML

<img alt="" data-vimeo-id="183637276" />
<img alt="" data-vimeo-id="183637276" />

JavaScript

var getVimeoThumbnail = function(id) {
    $.ajax({
        type:'GET',
        url: 'http://vimeo.com/api/v2/video/' + id + '.json',
        jsonp: 'callback',
        dataType: 'jsonp',
        success: function(data){
            var thumbnail_src = data[0].thumbnail_small;
            $('[data-vimeo-id='+id+']').attr('src', thumbnail_src);
        }
    });
};

var drawVimeoImages = function() {
    var vimeoImgDataAttr = 'data-vimeo-id',
        vimeoThumbnails = $('[' + vimeoImgDataAttr + ']'),
        vimeoThumbnailsLength = vimeoThumbnails.length;
    
    if(vimeoThumbnailsLength) {
        for(var i=0, l = vimeoThumbnailsLength; i < l; i++) {
            var vimeoImg = $(vimeoThumbnails).get(i),
                vimeoImgId = $(vimeoImg).attr(vimeoImgDataAttr);
            
            getVimeoThumbnail(vimeoImgId);
        }
    }
};

drawVimeoImages();