Video Scrolling

[Todd Kopriva]

I don’t see anything complex. Just layers with their Position properties animated so that the layers move from left to right.

I’m guessing that you’re very new to After Effects. I suggest that you work your way through some getting-started materials.

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Todd Kopriva, Adobe Systems Incorporated
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[Franco Strobbia]

Anyway, can be nice to write an expression to aling several layers and move it together.

[Franco Strobbia]

I found it this expression posted by Kevin Camp around here.
You can use the first layer (or a null) and apply the expression to the position of the following layers.

L=thisComp.layer(index-1);
L.transform.position+[(L.width*L.transform.scale[0]/200)+(width*transform.scale[0]/200),0]