Insert new hw video links (#1910)

docs/reference/radio/send-value.md

@@ -12,6 +12,14 @@ radio.sendValue("name", 0);
 * **name**: a [string](/types/string) that is the name of the value to send.
 * **value**: a [number](/types/number) that is the value to send.
 
+## ~ hint
+
+Watch this video to see how the radio hardware works on the @boardname@:
+
+https://www.youtube.com/watch?v=Re3H2ISfQE8
+
+## ~
+
 ## Example: Broadcasting acceleration
 
 This program sends your @boardname@'s **acceleration** (amount it is