How can I download this protected video from this Korean music website?

[wary]

First off, I really appreciate for any help that I get.

The video I want to retrieve and download is this: http://music.bugs.co.kr/mvPlayer?mvId=268696

This video loads slowly due to bad buffering.

I tried using open broadcaster software, but I can't record properly because the video stops in the middle (very annoying if you ask me).

I think this is a JavaScript-based video player, but someone can confirm it for me.

I couldn't find anything from page source either because the video's being protected.

Thank you!