Allows Youtube videos to be fullscreen in Feedly (and possibly other embedded media too, not just Youtube)

feedly-youtube-fullscreen.user.js

// ==UserScript==
// @name         Feedly fullscreen
// @namespace    https://github.com/Wizek
// @version      0.1
// @description  Allows Youtube videos to be fullscreen in Feedly (and possibly other embedded media too, not just Youtube)
// @author       Wizek
// @match        https://feedly.com/*
// @grant        none
// @require      https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js
// @noframe
// ==/UserScript==

// jshint asi:true

(function() {
    'use strict';
    setInterval(function () {
        var a = $('iframe:not([allowfullscreen])')
        if (a.length) {
            a.attr('allowfullscreen', true)
            var b = $('<div>')
            b.insertBefore(a)
            a.detach()
            a.insertAfter(b)
        }
    }, 1000)
})();