Webflow Sticky Sections
Reverse engineered version of Webflow's very own sticky section component found here: https://webflow.com/solutions/freelancers-agencies.
Details: - It's using a proxy div (4x) to call the 'Scroll In/Out of View' interactions -
There is custom code in the footer used for video playback controls (starting/stopping video at specific time based on scroll position) -
100% credit to Webflow team for design and implementation strategy