This is a quick solution I just programmed for a client that allows displays a down arrow "scroll hint" locked to the bottom of the browser window that slowly fades out as the page is scrolled down and  quickly fades back in if the page is scrolled back to the top. 

Get this FREE addon that allows you to install looping video backgrounds on Squarespace Cover Pages. This solution uses a locally hosted video rather than a video from YouTube, Vimeo or other streaming video services.  

I wanted to understand how people are engaging with my Squarespace website so I performed a test to measure visitor engagement and to work out whether single page “bouncing” visitors are engaging with the site at any level.  

The test results revealed that the vast majority of visitors interact and engage with the site, with only 12% not interacting at all. 

Squarespace Index pages don't trigger Google Analytics tracking for subpages loaded via Ajax.  This means you can't tell whether users are interacting with Index pages or just abandoning them. 

This article explains the problem and then demonstrates a custom script that enables this valuable analytics data to be tracked.

This jQuery script makes embedded YouTube, Vimeo and Instagram videos display correctly in responsive layouts. 

This article tells you how to easily track Squarespace form submissions in Google Analytics by adding a few lines of Javascript/JQuery to relevant pages.