YTDL-core downloads blank files, with no data

Hey, I'm trying to use ytdl-core but its stopped working across several version. When I download a video I get a blank file that is zero bytes. I'm expecting that videos should download as normal.

I'm running the most basic download but it work work.
`const fs = require('fs');
const ytdl = require('ytdl-core');

ytdl('http://www.youtube.com/watch?v=aqz-KE-bpKQ')
.pipe(fs.createWriteStream('video.mp4'));`

Any help on this would be greatly appreciated