Export Youtube Suscriptions

1. Enter: https://www.youtube.com/feed/channels

2. Open Console, paste:

function getLast() {
  return ytInitialData.contents.twoColumnBrowseResultsRenderer.tabs[0].tabRenderer.content.sectionListRenderer.contents.slice(-1)[0];
}

function canContinue() { 
  return getLast().continuationItemRenderer != null;
}

(async () => {
  while (canContinue()) {
    let current = getLast().continuationItemRenderer.continuationEndpoint.continuationCommand.token;
    scrollTo(0, document.getElementById('primary').scrollHeight);
    while (canContinue() && current == getLast().continuationItemRenderer.continuationEndpoint.continuationCommand.token) {
      await new Promise(r => setTimeout(r, 100));
    }
  }
  
  scrollTo(0, 0);
  
  const floatDiv = document.createElement('div');
  const preText = document.createElement('pre');
  floatDiv.setAttribute('style', `
    position: fixed;
    background: #0f0f0f;
    z-index: 100000;
    inset: 2rem;
    overflow: auto;
    font-size: 2rem;
    white-space: pre;
    color: white;
    padding: 1rem;
  `);

  const channels = ytInitialData.contents.twoColumnBrowseResultsRenderer.tabs[0]
    .tabRenderer.content.sectionListRenderer.contents
    .map(e => {
      if (!e.itemSectionRenderer) return null;
      return e.itemSectionRenderer.contents[0].shelfRenderer.content
        .expandedShelfContentsRenderer.items;
    })
    .flat()
    .filter(Boolean)
    .map(e => {
      if (!e.channelRenderer) return null;
      return {
        id: e.channelRenderer.channelId,
        url: `http://www.youtube.com/channel/${e.channelRenderer.channelId}`,
        title: e.channelRenderer.title.simpleText
      };
    })
    .filter(Boolean);

  const BOM = '\uFEFF';
  const headers = ['Channel Id', 'Channel Url', 'Channel Title'];
  const csvRows = [
    headers.join(','),
    ...channels.map(channel => 
      [
        channel.id,
        channel.url,
        // Properly escape title to handle commas and quotes
        `"${channel.title.replace(/"/g, '""')}"`
      ].join(',')
    )
  ];
  
  const csvContent = BOM + csvRows.join('\n');
  preText.textContent = csvContent;

  const downloadLink = document.createElement('a');
  downloadLink.innerText = 'Download CSV (Unicode)';
  downloadLink.setAttribute('target', '_blank');
  downloadLink.setAttribute('style', `
    color: #bf3838;
    font-weight: bold;
    margin-bottom: 1rem;
    display: block;
    padding: 1rem;
    border-radius: 0.5rem;
    border: 2px solid #bf3838;
    width: fit-content;
    text-decoration: none;
  `);

  const blob = new Blob([csvContent], { 
    type: 'text/csv;charset=utf-8'
  });
  downloadLink.href = URL.createObjectURL(blob);
  downloadLink.download = 'youtube_subscriptions.csv';

  floatDiv.appendChild(downloadLink);
  floatDiv.appendChild(preText);
  document.body.appendChild(floatDiv);
})();

OR

Create a bookmark with this URL:

javascript:(()=>{function getLast(){return ytInitialData.contents.twoColumnBrowseResultsRenderer.tabs[0].tabRenderer.content.sectionListRenderer.contents.slice(-1)[0]}function canContinue(){return null!=getLast().continuationItemRenderer}(async()=>{for(;canContinue();){let e=getLast().continuationItemRenderer.continuationEndpoint.continuationCommand.token;for(scrollTo(0,document.getElementById("primary").scrollHeight);canContinue()&&e==getLast().continuationItemRenderer.continuationEndpoint.continuationCommand.token;)await new Promise((e=>setTimeout(e,100)))}scrollTo(0,0);const e=document.createElement("div"),n=document.createElement("pre");e.setAttribute("style","\n    position: fixed;\n    background: #0f0f0f;\n%20%20%20%20z-index:%20100000;\n%20%20%20%20inset:%202rem;\n%20%20%20%20overflow:%20auto;\n%20%20%20%20font-size:%202rem;\n%20%20%20%20white-space:%20pre;\n%20%20%20%20color:%20white;\n%20%20%20%20padding:%201rem;\n%20%20%22);const%20t=ytInitialData.contents.twoColumnBrowseResultsRenderer.tabs[0].tabRenderer.content.sectionListRenderer.contents.map((e=%3Ee.itemSectionRenderer?e.itemSectionRenderer.contents[0].shelfRenderer.content.expandedShelfContentsRenderer.items:null)).flat().filter(Boolean).map((e=%3Ee.channelRenderer?{id:e.channelRenderer.channelId,url:%60http://www.youtube.com/channel/${e.channelRenderer.channelId}%60,title:e.channelRenderer.title.simpleText}:null)).filter(Boolean),o=%22\ufeff%22+[[%22Channel%20Id%22,%22Channel%20Url%22,%22Channel%20Title%22].join(%22,%22),...t.map((e=%3E[e.id,e.url,%60%22${e.title.replace(/%22/g,'%22%22')}%22%60].join(%22,%22)))].join(%22\n%22);n.textContent=o;const%20r=document.createElement(%22a%22);r.innerText=%22Download%20CSV%20(Unicode)%22,r.setAttribute(%22target%22,%22_blank%22),r.setAttribute(%22style%22,%22\n%20%20%20%20color:%20#bf3838;\n%20%20%20%20font-weight:%20bold;\n%20%20%20%20margin-bottom:%201rem;\n%20%20%20%20display:%20block;\n%20%20%20%20padding:%201rem;\n%20%20%20%20border-radius:%200.5rem;\n%20%20%20%20border:%202px%20solid%20#bf3838;\n%20%20%20%20width:%20fit-content;\n%20%20%20%20text-decoration:%20none;\n%20%20%22);const%20i=new%20Blob([o],{type:%22text/csv;charset=utf-8%22});r.href=URL.createObjectURL(i),r.download=%22youtube_subscriptions.csv%22,e.appendChild(r),e.appendChild(n),document.body.appendChild(e)})()})();

3. Import to NewPipe :-)

Source: https://gist.github.com/hoony0203/2007684ccf30c2075c25d457014fad9f

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