Add fixes.

common/lib/xmodule/xmodule/js/spec/video/iterator_spec.js

@@ -73,7 +73,7 @@ function (Iterator) {
                     expect(iterator.prev()).toBe('d');
                 });
 
-                it('returns previous item if index equal first item', function () {
+                it('returns last item if index equal first item', function () {
                     expect(iterator.prev()).toBe('e');
                 });
             });

common/lib/xmodule/xmodule/js/src/video/00_iterator.js

@@ -34,7 +34,7 @@ function() {
          * @desc Returns next element.
          *
          * @param {number} index If set, updates current index of iterator.
-         * @returns {DOM element}
+         * @returns {any}
          *
          */
         next: function (index) {
@@ -51,7 +51,7 @@ function() {
          * @desc Returns previous element.
          *
          * @param {number} index If set, updates current index of iterator.
-         * @returns {DOM element}
+         * @returns {any}
          *
          */
         prev: function (index) {
@@ -67,7 +67,7 @@ function() {
         /**
          * @desc Returns last element in the list.
          *
-         * @returns {DOM element}
+         * @returns {any}
          *
          */
         last: function () {
@@ -77,7 +77,7 @@ function() {
         /**
          * @desc Returns first element in the list.
          *
-         * @returns {DOM element}
+         * @returns {any}
          *
          */
         first: function () {