■realflow2013 graph editor 1
https://www.youtube.com/watch?v=qtrv_fdAJ7s

■realflow2013 graph editor 2
https://www.youtube.com/watch?v=copIGgyHGSM

■realflow2013 graph editor　3.1 - DataTypes
https://www.youtube.com/watch?v=RV9xBTJ3fvY

■realflow2013 graph editor　3.2 - ValueAndReference
https://www.youtube.com/watch?v=YeLX0OANPeQ

■realflow2013 graph editor　4 - Arrays
https://www.youtube.com/watch?v=eAPtiTgyGAA

■realflow2013 graph editor　5 - SharingDataBetweenGraphs
https://www.youtube.com/watch?v=E_tzyK6vOXk

■realflow2013 graph editor　6 - Graphs vs Python
https://www.youtube.com/watch?v=aeRzxp9KUoY

■realflow2013 graph editor　7 - ExecutionNodes
https://www.youtube.com/watch?v=19DNo0iGlaY