Changing a repeater box background color based on what URL source is in the video player

That would be great! For now I’ve gotten this code below to work, but it’s only relevant to clicking and doesn’t necessarily work 100% as intended. If you have time, I’d love to see the syntax you’re thinking because I’ve tried 20-30 different things that all failed haha… cheers!

let selectedRecord;

$w.onReady(function () {
            handleSelectItem();

            function handleSelectItem() {
                $w("#box1").onClick((event, $w) => {
                    if (selectedRecord) {
                        selectedRecord.style.backgroundColor = "#ffffff"; //reset previously select record
                    }
                    let $item = $w.at(event.context); //get scoped selector
                    selectedRecord = $item("#box1");
                    selectedRecord.style.backgroundColor = "#ffcc37"; //highlight newly selected one
                });}})