Update wording

src/Wizards/Video.vala

@@ -320,7 +320,7 @@ namespace Publicate.Wizards {
             if(!gtk_switch.active) {
                 return;
             }
-            var prompt = new Adw.MessageDialog(toplevel, "Enable Proprietary Codecs?", "This will enable the H.264 codec which is needed for this PPUB to be playable on iOS Safari, but there may be restrictive patient licences that apply to its use.");
+            var prompt = new Adw.MessageDialog(toplevel, "Enable Proprietary Codecs?", "This will enable the H.264 and AAC codecs which are needed for this PPUB to be playable on iOS Safari, but there may be restrictive patient licences that apply to their use.");
             prompt.add_response("info", "Read More");
             prompt.add_response("cancel", "Cancel");
             prompt.add_response("enable", "Enable");