https://www.snip2code.com/Snippet/143281/Tweetdeck-TwitterCards

Tweetdeck_Thumbnail_from_TwitterCards.user.js

// ==UserScript==
// @name    Tweetdeck Thumbnail from TwitterCards
// @include https://tweetdeck.twitter.com/*
// @version 1.0
// @grant   unsafeWindow
// @license MIT License
// ==/UserScript==

(function(){
	var TD = unsafeWindow.TD;

	TD.services.TwitterStatus.prototype.fromJSONObject_prev = TD.services.TwitterStatus.prototype.fromJSONObject;
	TD.services.TwitterStatus.prototype.fromJSONObject = function(e) {
		if (!e.entities.media && e.cards) {
			var cards = e.cards.photos || e.cards.summaries || e.cards.players;
			var card = cards[0];
			if (card && card.images.web) {
				var url = {
					// expanded_url: card.images.web.image_url,
					expanded_url: card.images.web.image_url_2x,
					url: "",
					display_url: "",
					indices: [0, 0],
				};
				// e.entities.urls.unshift(url);
				e.entities.urls.push(url);
			}
		}
		return this.fromJSONObject_prev(e);
	};

	TD.services.TwitterMedia.SERVICES["twittercards"] = /^https?:\/\/\w+\.twimg\.com\/\d\/proxy\.(?:jpe?g|png|gif|bmp)\?.+/;
	TD.services.TwitterMedia.prototype.small_prev = TD.services.TwitterMedia.prototype.small;
	TD.services.TwitterMedia.prototype.small = function() {
		if (this.service === "twittercards") {
			return this.urlMatches[0];
		}
		return this.small_prev();
	};
	TD.services.TwitterMedia.prototype.medium_prev = TD.services.TwitterMedia.prototype.medium;
	TD.services.TwitterMedia.prototype.medium = function() {
		if (this.service === "twittercards") {
			return this.small();
		}
		return this.medium_prev();
	};
	TD.services.TwitterMedia.prototype.large_prev = TD.services.TwitterMedia.prototype.large;
	TD.services.TwitterMedia.prototype.large = function() {
		if (this.service === "twittercards") {
			return this.small();
		}
		return this.large_prev();
	};
	TD.services.TwitterStatus.prototype.render_prev = TD.services.TwitterStatus.prototype.render;
	TD.services.TwitterStatus.prototype.render = function(e) {
		var medias = this._media;
		if (medias && medias.length > 0) {
			for (var i = 0; i < medias.length; i++) {
				if (medias[i].service === "twittercards") {
					e.mediaPreviewSize = TD.vo.Column.MEDIA_PREVIEW_SIZE_SMALL;
					break;
				}
			}
		}
		return this.render_prev(e);
	};
})();