diff --git a/docs/assignments/week11-machines/tic-tac-toe-machine.md b/docs/assignments/week11-machines/tic-tac-toe-machine.md
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+++ b/docs/assignments/week11-machines/tic-tac-toe-machine.md
@@ -1,3 +1,13 @@
 # Tic Tac Toe Machine
 
+# Iteration 1
 
+Sending custom commands to arduino via Serial Interface
+
+<video width="600" height="400" controls>
+  <source src="../tic-tac-toe-machine/iteration-1-sending-custom-commands-to-arduino-via-serial.m4v" type="video/mp4">
+</video>
+
+# Iteration 2
+
+Sending GCODE commands to Arduino with GRBL installed
\ No newline at end of file
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