Responsive YouTube Player and YouTube Timestamp for Roamresearch

Play-Button.cs

.timestamp-control{
  background-color: rgba(108,109,36,0.1); 
  color: rgb(251,106,13);
  margin-right: 8px;
  margin-top: 3px;
  margin-bottom: 3px;
  border-radius: '50%';
  border-style: inset;  
  border-color: #FF3200;
  font-size: 0.9em;
}
.timestamp-control:hover {
  background-color: rgba(108,109,36,0.25); 
  border-style: outset;  
  color: #FFFFFF;
}

Responsive-Timestamped-YouTube.user.js

// ==UserScript==
// @author       Connected Cognition Crumbs <c3founder@gmail.com>
// @description  Add timestamp controls to YouTube videos embedded in Roam and makes the player responsive. 
// @match        https://*.roamresearch.com

(function() {
    let ytApiReady = false;
    const players = new Map();  	
    const activateYtVideos = () => {	
        if (!ytApiReady) {
            if (window.YT !== undefined) loadYtApi(); // wait until Roam loads its YT, then insert script on top
            return null;
        }
        Array.from(document.getElementsByTagName('IFRAME'))
            .filter(iframe => iframe.src.includes('youtube.com'))            
            .forEach(ytEl => {          		
          		const block = ytEl.closest('.roam-block-container');
          		const rsideBar = ytEl.closest('#right-sidebar');
          		if(ytEl.src.indexOf("enablejsapi") === -1){                    
                  var ytId = extractVideoID(ytEl.src); 
                  const parent = ytEl.parentElement;    
                  frameId =  rsideBar ? (ytId + '-rSide') : ytId; 
                  parent.id = frameId;                  			  
                  ytEl.remove();
                  players[frameId] = new window.YT.Player(parent.id, {
                    height: '300',
                    width: '450', 
                    videoId: ytId
                  });          
                  wrapIframe(frameId);
                } else {				                    
                  const begEmbed = ytEl.src.indexOf("enablejsapi");
                  var ytId = ytEl.src.substring(begEmbed - 12, begEmbed - 1);
                  frameId =  rsideBar ? (ytId + '-rSide') : ytId; 
                }         
          		addTimestampControls(block, players[frameId]);   
          		var sideBarOpen = document.getElementById("right-sidebar").childElementCount - 1;
          		//Make iframes flexible
          		adjustIframe(frameId, sideBarOpen);  
        	});
    };

  	
  
    const addTimestampControls = (block, player) => {
      if (block.children.length < 2) return null;
      //const childBlocks = Array.from(block.children[1].children);
      const childBlocks = Array.from(block.children[1].querySelectorAll('.roam-block-container'));
      childBlocks.forEach(child => {
        const timestamp = getTimestamp(child);
		//console.log(timestamp)
        const buttonIfPresent = child.querySelectorAll('.timestamp-control')[0]
        if (buttonIfPresent) {
          	buttonIfPresent.remove();
        }
        if (timestamp) { 
          addControlButton(child, () => player.seekTo(timestamp, true));
        }
      });
	};
  
	const adjustIframe = (frameId, sideBarOpen) => {
      var child = document.getElementById(frameId); //Iframe
      var par = child.parentElement;
      if(sideBarOpen){
        child.style.position = 'absolute';
        child.style.margin = '0px';
        child.style.border = '0px';
        child.style.width = '100%';
        child.style.height = '100%';
        child.style.borderStyle = 'inset';
        child.style.borderRadius = '25px';
        par.style.position = 'relative';
        par.style.paddingBottom = '56.25%';     
        par.style.height = '0px';
      } else {
      	child.style.position = null;
        child.style.margin = '0px';
        child.style.border = '0px';        
        child.style.width = '600px';
        child.style.height = '400px';
        child.style.borderStyle = 'inset';
        child.style.borderRadius = '25px';
        par.style.position = null;
        par.style.paddingBottom = '0px';   
		par.style.height = '420px';
      }
    }
    
    const wrapIframe = (frameId) => {
      var child = document.getElementById(frameId); //Iframe
      var par = document.createElement('div');
      child.parentNode.insertBefore(par, child);
      par.appendChild(child);
      child.style.position = 'absolute';
      child.style.margin = '0px';
      child.style.border = '0px';
      child.style.width = '100%';
      child.style.height = '100%';
      par.style.position = 'relative';
      par.style.paddingBottom = '56.25%';     
      par.style.height = '0px';
    };
    const getControlButton = (block) => block.querySelectorAll('.timestamp-control')[0];

    const addControlButton = (block, fn) => {
        const button = document.createElement('button');
        button.innerText = '►';
        button.classList.add('timestamp-control');
      	button.style.borderRadius = '50%';
        button.addEventListener('click', fn);
        const parentEl = block.children[0].children[0];
        parentEl.insertBefore(button, parentEl.querySelectorAll('.roam-block')[0]);
    };

    const getTimestamp = (block) => {
        const innerBlockSelector = block.querySelectorAll('.roam-block');
        const blockText = innerBlockSelector.length ? innerBlockSelector[0].textContent : '';
        const matches = blockText.match(/^((?:\d+:)?\d+:\d\d)\D/); // start w/ m:ss or h:mm:ss
      	//console.log(matches)
        if (!matches || matches.length < 2) return null;
        const timeParts = matches[1].split(':').map(part => parseInt(part));
        if (timeParts.length == 3) return timeParts[0]*3600 + timeParts[1]*60 + timeParts[2];
        else if (timeParts.length == 2) return timeParts[0]*60 + timeParts[1];
        else return null;
    };
  
    const loadYtApi = () => {
        const tag = document.createElement('script');
        tag.src = 'https://www.youtube.com/iframe_api';
        const firstScriptTag = document.getElementsByTagName('script')[0];
        firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); 
        window.onYouTubeIframeAPIReady = () => { ytApiReady = true; };
    };
  
  	const extractVideoID = (url) => {
      var regExp = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/;
      var match = url.match(regExp);
      if ( match && match[7].length == 11 ){
          return match[7];
      }else{
          return null; //alert("Could not extract video ID.");
      }
    };
  
    setInterval(activateYtVideos, 1000);
})();