README: mention some more video where the effect is used

diff --git a/README b/README
index 1672722..20ea8e5 100644 (file)
--- a/README
+++ b/README
@@ -9,6 +9,9 @@ Some examples of it are:
   The Jacksons - Blame It On The Boogie - https://www.youtube.com/watch?v=mkBS4zUjJZo
   OK Go - WTF? - https://www.youtube.com/watch?v=12zJw9varYE
   Elisa - L'Anima Vola - https://www.youtube.com/watch?v=MqhxIQD16EA
+  Kool & The Gang - Get Down On It - https://www.youtube.com/watch?v=qchPLaiKocI
+  Kool & The Gang - Steppin' Out - https://www.youtube.com/watch?v=KRuiVyq2Akc
+  Earth, Wind & Fire - September - https://www.youtube.com/watch?v=Gs069dndIYk
 
 opencv_trail_effect draws a trail after performing foreground segmentation
 using OpenCV.