How do I find commentary tracks for 2 achievements?

[topolskiego]

I don't seem to find them. Is it from the DLC or I'm missing something?

[A Gelatinous Cube-Z-]

You're missing something. When you're playing the movie, there's a little control panel. The option to turn on a commentary track is in that panel.

[topolskiego]

I just found it and got achievements but thanks anyway