Update README.md

Author: ElectricRCAircraftGuy

README.md

@@ -9,10 +9,15 @@ This repo contains, the "Hardware" files to support STM32 based boards on Arduin
 * Based on https://github.com/bobc/maple-asp, which is in turn based on LibMaple by Leaflabs  
 * See also my blog: http://www.rogerclark.net/stm32f103-and-maple-maple-mini-with-arduino-1-5-x-ide/  
 * **NEW: Main support site for using STM32 boards with the Arduino IDE: http://www.stm32duino.com/**  
+* LeafLabs "Maple Language Reference:" http://leaflabs.com/docs/language.html
 
-##Additional Help & Links:  
+**YouTube Videos:** 
+* 20141116: Arduino 1.5.8 IDE with STM32 board - https://www.youtube.com/watch?v=-zwGnytGT8M
+* 20150413: STM32 for Arduino 1.6.2 or newer (update) - https://www.youtube.com/watch?v=TePglhSkghg
+* 20150419: Uploading via USB to Serial to STM32F103 boards - https://www.youtube.com/watch?v=G_RF0a0hrak
+
+##Additional Links & Info:  
 * https://www.hackster.io/rayburne/4-dollar-90-mips-32-bit-72-mhz-arm-arduino  
-* 
 
 ##Purchase info:  
 [Ebay search for "arduino maple"](http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&LH_BIN=1&_nkw=arduino+maple&_sop=15) (currently costs <$5 with shipping)