diff --git a/README.md b/README.md
index 796f1d8..b6d4cf9 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ You will need the following hardware to wire up the range hood:
 
 - 1x ESP device such as ESP32-C3 Super Mini
 - 5x optocouplers such as 4N35\*
-- 5x resistors 1 k$\Omega$
+- 5x resistors 1 $k\Omega$
 - 1x PNP transistor such as 2N3906
 - 1x 2cm $\times$ 8cm perforated prototype board
 
@@ -24,6 +24,8 @@ than sufficient for this task. That said, I do not guarantee that it wlll work
 with PC817 optocouplers. I suggest doing a test on one of the buttons using a
 breadboard before making a more permanent installation.
 
+[YouTube video](https://youtu.be/M4eqwwUxp7Q)
+
 For safety, unplug the range hood from the AC power source before taking it
 apart. Remove the drip tray and the washable baffle filters. Use a screwdriver
 to remove the 8 screws from the fan cover assembly and remove the cover. You
@@ -89,3 +91,8 @@ can be used to control the device, or you can interface the device with
 something like Home Assistant for a graphical user interface. Each button on
 the board can be pressed by using `command X`, where `X` is one of `timer`,
 `up`, `down`, `light`, or `power`.
+
+### Licensing
+
+The ESPHome component code is distributed under the [GNU General Public License
+version 3](LICENSE).
diff --git a/wiring.png b/wiring.png
index 032342f..614c05e 100644
Binary files a/wiring.png and b/wiring.png differ