diff --git a/index.html b/index.html
index 860629a..035892a 100644
--- a/index.html
+++ b/index.html
@@ -401,7 +401,7 @@
 						Vícefaktorové přihlašovaní
 					</h2>
 					<section>
-						<p class="fragment">Heslo není jediný způsob, jak ověřit uživatele</p>
+						<p class="fragment">Heslo není jediný způsob, jak ověřit uživatele<a class="fn" href="https://www.youtube.com/watch?v=hGRii5f_uSc"></a></p>
 					</section>
 					<section>
 						<h3>tři faktory:</h3>
@@ -415,9 +415,10 @@
 						<img class="fragment fade-up" style="box-shadow: 0 0 7px 0 #050505; border-radius: 20px" src="assets/images/iphoneclipart.png" height="300">
 					</section>
 					<section>
-						<img src="assets/images/googleconfirm.png" height="500" alt="">
+						<img src="assets/images/googleconfirm.png" height="400" alt="">
 						<!-- phone from: https://facebook.design/devices generated using: https://mockuphone.com/ -->
-						<img src="assets/images/googleconfirm-phone.png" height="500" alt="">
+						<img src="assets/images/googleconfirm-phone.png" height="400" alt="">
+						<p style="font-size: smaller">myaccount.google.com/security<a href="https://myaccount.google.com/security" class="fn"> </a></p>
 					</section>
 					<section>
 						<img src="assets/images/authy-features-setup_phone.png" height="500" alt="" style="float: left;">
@@ -427,6 +428,7 @@
 						<p>
 							návody, jak vícefaktor zapnout<a href="https://authy.com/guides/" class="fn"></a>
 						</p>
+						<p style="font-size: smaller"> (Google Authenticator) </p>
 					</section>
 				</section>
 				<section>