Was just thinking ( and may not be right for you ) but why can’t it all be done on one scene.
This uses a Math function on an element animation keyframe in a timeline ( in the video’s symbol ) to control where the video time is.
The math functions runs an aliased function in matchPosition() ( see this post of how this idea works )
The scroll() function deals with up down and controls the follow timeline as well as any other animation timeline. In this I have one.
This probably just re invents the wheel but just a thought…
Also the only reason the video is in a symbol is that’s how I started it out when I first had a quicklook at using multiple scenes with this approach.
But although I got it to work mostly!; it was cumbersome to do and in the end felt it made no sense having a lot of scenes just for info.
pa1.2.zip (2.5 MB)
( And as usual, just a quick thrown together example , the scroll detection in this example is limited on which device it will work with but should be easy to change to a more robust bit of code… )