I changed one thing after following the video tutorial but I'm still getting the same crashes.

Here is the crash log:

http://www.privatepaste.com/491dc63491

and here is my new setup when that crash occurred:

http://www.privatepaste.com/752335208c

I removed Interact With Target from Variable Keybindings and I manually set the actions to broadcast all per the instruction in your video. However crash is still occurring. (Although it seemed to last longer before a crash)