I removed the on layout unload action that jumps to intro and moved the jump to scene (intro) timeline action from the main timeline to the video tracking timeline. (Placed at the same time 1.26.00)
You also seemed to have a action on the video track that did nothing, I removed that.
I then gave the video in intro the id 'video' and added the JS function and change the the timeline being used to video tracking .
This JS is called on the on scene load for the scene intro