insd-2021.js

javascript:
var description = 'Instagram Photo & Stories Download';
var copyright = 'Nhat Bui (nhatminhbui.github.io)';
function getImgURL() {
  x = window.innerWidth*3/7;
  y = window.innerHeight/2;
  img = document.elementsFromPoint(x, y);
  while (typeof img == 'undefined') {
  }
  return img[1].src; 
}

function getStoryURL() {
  function getStoryImgURL() {
    img_src = story[3].src;
    if (img_src.includes('e35/c0.')) {
      return story[3].srcset.split(' ')[0];
    } else return story[3].src;
  }
  function getStoryVideoURL() {
    if (typeof story[3].firstChild.src == 'undefined') {
        return story[5].firstChild.src;
    } else return story[3].firstChild.src;
  }
  x = window.innerWidth/2;
  y = window.innerHeight/2;
  story = document.elementsFromPoint(x, y);
  while (typeof story == 'undefined') {
  }
  if (story[3].firstChild === null) {
    return getStoryImgURL();
  } else {
    return getStoryVideoURL();
  }
}

url = document.URL;
if (url.includes("stories")) {
  window.open(getStoryURL(), '_blank');
} else {
  window.open(getImgURL(), '_blank');
}