quick files batch rename

const fs = require('fs');

fs.readdirSync('./').forEach(file => {
    if (file.endsWith('.mkv')) {
        let clean = file.split('.');
        let pos = clean.indexOf('720p');
        clean = clean.slice(0, pos).join(' ') + '.mkv';
        console.log(file, clean, pos);
        fs.renameSync(file, clean);
    }
});