I've set up a publication on Adobe InDesign CC (2016), in the Overlay tools: the Scrollable Text function is set up correctly
However when Publishing Online, the scrollable text is not functioning on the browser.
I had the same problem, I use the free panel from Ajar to get it working.
Universal Scrolling Frames | Ajar Productions
The Overlay tools ONLY work with Digital Publishing Suite or Digital Publishing Solution (DPS 2015) software.
That's why gert's suggestion is a good one.
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