Show the views per day of youtube videos on a channel (normalized popularity rating)

youtubeViewsPerDay.js

document.querySelectorAll('div#metadata-line').forEach(e => {
	if (/\/d/.exec(e.innerHTML)) return;
	vk = /(\d+\.?\d?)K views/.exec(e.innerHTML);
	vk = vk ? vk[1] : 0;
	v = /\d+(\.\d)? view/.exec(e.innerHTML);
	v = v ? v[1] : (vk ? vk * 1000 : 0);
	y = /(\d) year/.exec(e.innerHTML);
	y = y ? y[1] : 0;
	m = /(\d) month/.exec(e.innerHTML);
	m = m ? m[1] : 0;
	d = /(\d) day/.exec(e.innerHTML);
	d = d ? d[1] : (m ? m * 30 : (y ? y * 365 : 0));
	if (d && v) {
		vpd = Math.round(v / d);
		e.querySelector('span').innerHTML += (" (" + vpd + "/d)");
	}
})