Paste the following into a bookmark. When you're on a youtube channel's video page, you can now sort that page by view count. This new version works with the 2022 UI refresh that added rows to the mix.

sort-youtube-bookmarklet.js

javascript: function findMetrics(el) {
  return el.textContent;
}

function findNodes(el) {
  return el.querySelectorAll('#metadata-line');
}

function isDigit(str) {
  return str.length === 1 && str.match(/[0-9]/i);
}

function metricVal(el) {
  let modifiers = {
    K: 1e3,
    M: 1e6,
    B: 1e9,
  };
  let text = findNodes(el)[0]?.textContent.trim();
  if (!text) {
    console.log('empty text');
    return NaN;
  };
  const match = text.match(/\d+(\.\d+)?[KMB]?/);
  if (!match) {
    console.log("bad parse " + text);
    return NaN;
  }
  const numText = match[0];
  let number;
  if (isDigit(numText[numText.length - 1])) {
    number = +numText;
  } else {
    number = +numText.slice(0, -1);
    const modChar = match[0].slice(-1);
    number = number * modifiers[modChar];
  }
  console.log(`text: ${text}, numText: ${numText}, number: ${number}`);
  return number;
}

function compare(el1, el2) {
  let val1 = metricVal(el1);
  let val2 = metricVal(el2);
  if (val1 < val2) return 1;
  if (val1 > val2) return -1;
  return 0;
}

function findCommonParent(el1, el2) {
  const seen = new Set();
  let next = el1;
  while (next) {
    seen.add(next);
    next = next.parentNode;
  }
  next = el2;
  while (next) {
    if (seen.has(next)) {
      return next;
    } else {
      next = next.parentNode;
    }
  }
  return null;
}

function main() {
  let rows = [...document.querySelectorAll('#contents.ytd-rich-grid-row')];
  let items = [];
  for (const row of rows) {
    for (const item of row.children) {
      items.push(item);
    }
  }
  const itemsPerRow = rows[0].children.length;
  items.sort(compare);
  for (let i = 0; i < items.length; i++) {
    const row = rows[Math.floor(i / itemsPerRow)];
    if (i % itemsPerRow === 0) {
      row.innerHTML = '';
    }
    row.appendChild(items[i]);
  }
}
main();