Not sure if this is what you mean, you would need to explain more??
But here is a stab at it..
There is no JS.
The symbol is the Thumbnail strip. This is persistent across scenes.
Each scene hold a single video.
Each thumb changes the scene and runs a symbol timeline to move the position of the gold band used as a marker on the thumbs.
videoLoadhype 2.hype.zip (2.4 MB)