Ask HN: How is Netflix able to prevent screenshots on Chrome?

The other day I tried to screenshot a funny frame in a Netflix video to show to a friend and the image came out black. I tried both the `prtsc key` and the `Snipping Tool`. This got me wondering is JavaScript able to interfere with the built-in OS printscreen function ?

I was using Chrome on a Windows 10 machine, and in the end, strangely enough, I was able to take the screenshot on the Netflix Android app.