Easily retrieve data about “most replayed” graph for videos on Youtube.
YouTube's implementation on the web page is relatively straight forward and easy to extract (using an extension inject). A SVG tag on the page (svg.ytp-heat-map-svg 1000x100) contains a path defined with cubic Bézier curves (a C followed by three x,y pairs).
Every third x,y parameter after a C, where x ends with 5.0, is a usable data point:
x is the time stamp in percent. Just compute (x-5)/1000 for a value from 0 to 1.
y is the heat value for this time period. Just compute (100-y)/100 for a value from 0 to 1.
Internally puppeteer is used, so you can pass optional parameters as the second parameter, they are documented here.
var search = require('youtube-heatmap');
getHeatMap('https://www.youtube.com/watch?v=_lEzN8C5c7k')
.then(heatMap => {
console.log(heatMap)
})A TypeScript definition file is included so that 'youtube-search' can be used easily from TypeScript.
import { getHeatMap } from 'youtube-heatmap'
const heatMap = await getHeatMap('https://www.youtube.com/watch?v=_lEzN8C5c7k')
console.log(heatMap)