A first stab at a instagram loader for the web version of TweetDeck. It needs to be run on a loop and also needs to keep a record of all the links it has gathered.

instagram_tweetdeck.js

// ==UserScript==
// @name           TweetDeck Instagram
// @description    Adds instagram to Tweetdeck
// @include        https://tweetdeck.twitter.com/*
// @include		   chrome-extension://hbdpomandigafcibbmofojjchbcdagbl/*
// @version        0.1
// ==/UserScript==

var func = function () {

	var Instagram = function () {
		this.links = [];
	};

	Instagram.prototype.add = function (url, element) {

		if (this.links.indexOf(url) !== -1) {
			// already done this link
			return;
		}
		this.links.push(url);

		var script = document.createElement('script'),
			// create a random callback
			callback = 'instagram_' + Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);

		// add the url
		script.src = 'https://api.instagram.com/oembed?url=' + url + '&callback=' + callback;

		// append the script
		document.head.appendChild(script);

		// create the callback on the window object since this is annoyomoused 
		window[callback] = function (res) {
            
	        	var ext = res.url.substring(res.url.lastIndexOf('.') + 1),
	            	    obj = false;
            
            		if (ext === 'mp4') {
               			obj = document.createElement('video');
                		obj.controls = 'true';
            		} else {
            			obj = document.createElement('img');
            		}

			obj.src = res.url;
			obj.width = "230";
            		obj.style.marginTop = "10px";
			this.insertBefore(obj);
		}.bind(element);
	};

	
	var instagram = new Instagram();

	var poll = function () {
		var nodes = document.getElementsByTagName('a');
		for (var i = 0; i < nodes.length; i++) {
			if (nodes[i].innerHTML.indexOf('instagram.com') !== -1) {
				instagram.add(nodes[i].innerHTML, nodes[i]);
			}
		}
	};

	setInterval(poll, 1000);
};

var script = document.createElement("script");
script.textContent = "(" + func.toString() + ")();";
document.body.appendChild(script);