Splines blueprint questions

Hello again!

I’m currently working with splines, this is the current blueprint I have:

under that is another code related to put numbers under every spline point. But, I’m currently trying to make a tree like in this video: Procedural Nature Pack (UE4) - Final - YouTube

Now, how can i make things “grow” out of a spline point, also how can i edit the yaw, roll, add branches, tesselation, etc(Look in video at time 1:06)? Any help is very appreciated!