Found a solution! I saved the function as an external file to be appended to the <head>
in the main DOM whenever the corresponding article is called, instead of being nested in the primary Javascript file.
function itemInvoked(e) {
var currentArticle = articlesList.getAt(e.detail.itemIndex);
WinJS.Utilities.setInnerHTMLUnsafe(articlecontent, currentArticle.content);
var videoScript = document.createElement("script");
videoScript.type = "text/javascript";
videoScript.src = "/js/videoEditScript.js"
document.getElementsByTagName("head")[0].appendChild(videoScript);
articlelist.style.display = "none";
articlecontent.style.display = "";
mainTitle.innerHTML = currentArticle.title;
WinJS.UI.Animation.enterPage(articlecontent);
}