Update howto.txt

Remove old KiCad domain and link tutorial video names found from Wayback Machine.

Author: bboyho

Tools/OSHW_logo_KiCad_scalable/docs/howto.txt

@@ -5,6 +5,12 @@ How to make your own:
 Watch / read this first:
 
 * http://www.kicad.org/display/KICAD/Videos+by+zupnikal
+  * PCB layout with KiCad => https://www.youtube.com/playlist?list=PL67B2290F4C62B5F2
+    * KiCad #1 - Mounting hole clearance and cut-out zone in the copper pour
+    * KiCad #2 - Solder mask clearance
+    * KiCad #3 - Using 'FreeRoute' to create a simple board
+    * KiCad #4 - Adding the OSHW logo to your layout
+    * KiCad #5 - Using custom logos in your design
 
 The last two videos should be helpful for how to create a custom .emp file from images.