Open embedded youtube videos in Canvas to print to pdf

OpenFrames.js

// These embedded links have full transcripts but print to pdf can't get at the content. Opening into a dedicated non-iframe window
// and clearing the fixed height, removes scrollbars and allowing print to pdf to work as expected
function openAllFrames() { 
    var iframes = Array.from(document.querySelectorAll('#content-wrapper iframe'));
    
    iframes.forEach(function(f) {
        window.open(f.src, "_blank");
    });
}

// Create clickable action item
var text = document.createElement('h1');
text.textContent = 'Open All Frames';
text.addEventListener('click', openAllFrames);

const contentWrapper = document.querySelector('#content-wrapper');
contentWrapper.insertBefore(text, contentWrapper.firstChild);